GMC Sierra Owner Manual - 2011 Black plate (67,1)

Driving and Operating 9-67

6. Turn the transfer case dial 10. Release the parking brake prior 4. Release the parking brake prior
clockwise to N (Neutral) until to moving the vehicle. to moving the vehicle.
it stops and hold it there until 11. Turn the ignition to LOCK/OFF. Notice: Shifting the transmission
the N (Neutral) light starts into gear before the requested
blinking. This will take at least Shifting Out of Neutral mode indicator light has stopped
10 seconds. Then slowly release To shift out of N (Neutral) do the flashing could damage the
the dial to the four low position. following: transfer case. To help avoid
The N (Neutral) light will come damaging the vehicle, always
on when the transfer case shift 1. Set the parking brake and apply
the regular brake pedal. wait for the mode indicator lights
to N (Neutral) is complete. to stop flashing before shifting
7. If the engine is running, make 2. Turn the ignition to ON/RUN with the transmission into gear.
sure that the transfer case is the engine off, and shift the
transmission to N (Neutral). 5. Start the engine and shift the
in N (Neutral) by shifting the transmission to the desired
transmission to R (Reverse) 3. Turn the transfer case dial position.
for one second, then shift the to Two-Wheel Drive High,
transmission to D (Drive) for Four-Wheel Drive High,
one second. or AUTO.
8. Turn the ignition to After the transfer case has
ACC/ACCESSORY, which shifted out of N (Neutral), the
will turn the engine off. N (Neutral) light will go out.
9. Place the transmission shift
lever in P (Park).

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GMC Sierra Owner Manual - 2011 Black plate (68,1)

9-68 Driving and Operating

Brakes As the brakes are applied, the

computer keeps receiving updates
on wheel speed and controls
Antilock Brake braking pressure accordingly.
System (ABS) Remember: ABS does not change
This vehicle has the Antilock the time needed to get a foot up to
Brake System (ABS), an advanced If there is a problem with ABS, this the brake pedal or always decrease
electronic braking system that helps warning light stays on. See Antilock stopping distance. If you get too
prevent a braking skid. Brake System (ABS) Warning Light close to the vehicle in front of you,
on page 5‑28. there will not be enough time to
When the engine is started and the
If driving safely on a wet road apply the brakes if that vehicle
vehicle begins to drive away, ABS
and it becomes necessary to suddenly slows or stops. Always
checks itself. A momentary motor
slam on the brakes and continue leave enough room up ahead to
or clicking noise might be heard
braking to avoid a sudden obstacle, stop, even with ABS.
while this test is going on, and
it might even be noticed that a computer senses that the wheels Using ABS
the brake pedal moves a little. are slowing down. If one of the
This is normal. wheels is about to stop rolling, Do not pump the brakes. Just hold
the computer will separately the brake pedal down firmly and let
work the brakes at each wheel. ABS work. You might hear the ABS
pump or motor operating and feel
ABS can change the brake pressure the brake pedal pulsate, but this is
to each wheel, as required, faster normal.
than any driver could. This can help
the driver steer around the obstacle
while braking hard.

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GMC Sierra Owner Manual - 2011 Black plate (69,1)

Driving and Operating 9-69

Braking in Emergencies If the ignition is on, the brake Brake Assist (Except
system warning light will come on.
ABS allows the driver to steer and
See Brake System Warning Light on
With 4.3L V6 Engine)
brake at the same time. In many
page 5‑27. If this vehicle has StabiliTrak®, it
emergencies, steering can help
Notice: Driving with the parking also has a Brake Assist feature
more than even the very best
brake on can overheat the brake designed to assist the driver in
braking.
system and cause premature stopping or decreasing vehicle
wear or damage to brake system speed in emergency driving
Parking Brake conditions. This feature uses the
parts. Make sure that the parking
brake is fully released and the stability system hydraulic brake
brake warning light is off before control module to supplement
driving. the power brake system under
conditions where the driver has
To release the parking brake, hold quickly and forcefully applied the
the regular brake pedal down, then brake pedal in an attempt to quickly
push down momentarily on the stop or slow down the vehicle.
parking brake pedal until you feel The stability system hydraulic brake
the pedal release. Slowly pull your control module increases brake
foot up off the parking brake pedal. pressure at each corner of the
If the parking brake is not released vehicle until the ABS activates.
when you begin to drive, the brake
system warning light will flash and a
chime will sound warning you that
Set the parking brake by holding
the parking brake is still on.
the regular brake pedal down, then
pushing down the parking brake If you are towing a trailer and
pedal. are parking on a hill, see Driving
Characteristics and Towing Tips on
page 9‑91.
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GMC Sierra Owner Manual - 2011 Black plate (70,1)

9-70 Driving and Operating

Minor brake pedal pulsation or activated. During the transition Ride Control Systems
pedal movement during this time period between when the driver
is normal and the driver should releases the brake pedal and starts
continue to apply the brake pedal to accelerate to drive off on a grade, StabiliTrak® System
as the driving situation dictates HSA holds the braking pressure The vehicle may have a vehicle
The Brake Assist feature will for a maximum of two seconds stability enhancement system called
automatically disengage when to ensure that there is no rolling. StabiliTrak®. It is an advanced
the brake pedal is released or The brakes will automatically computer-controlled system that
brake pedal pressure is quickly release when the accelerator pedal assists the driver with directional
decreased. is applied within the two‐second control of the vehicle in difficult
window. If the vehicle is equipped driving conditions.
Hill Start Assist (HSA) with the Integrated Trailer Brake
StabiliTrak activates when the
Control (ITBC) system, HSA may
2500 and 3500 series vehicles with also apply the trailer brakes. It will computer senses a discrepancy
StabiliTrak have a Hill Start Assist not activate if the vehicle is in a between the intended path and
(HSA) feature, which may be useful drive gear and facing downhill or the direction the vehicle is actually
when the vehicle is stopped on a if the vehicle is facing uphill and traveling. StabiliTrak selectively
grade. This feature is designed to in R (Reverse). There may be applies braking pressure at any one
prevent the vehicle from rolling, situations on minor hills (less than of the vehicle's brakes to assist the
either forward or rearward, during 5% grade) with a loaded vehicle or driver with keeping the vehicle on
vehicle drive off. After the driver while pulling a trailer where HSA the intended path.
completely stops and holds the will not activate.
vehicle in a complete standstill on
a grade, HSA will be automatically

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GMC Sierra Owner Manual - 2011 Black plate (71,1)

Driving and Operating 9-71

When the vehicle is started CONTROL OFF, SERVICE The system may be heard or felt
and begins to move, the system TRACTION CONTROL, while it is working; this is normal.
performs several diagnostic checks STABILITRAK OFF, SERVICE
to insure there are no problems. STABILITRAK. If these DIC
The system may be heard or messages appear, make sure the
felt while it is working. This is StabiliTrak system has not been
normal and does not mean there turned off using the StabiliTrak
is a problem with the vehicle. on/off button. Then turn the vehicle
The system should initialize off, wait 15 seconds, and turn it
before the vehicle reaches 32 km/h back on again to reset the system. The traction control disable button
(20 mph). In some cases, it may If any of these messages still is located on the instrument panel
take approximately 3.2 km (2 mi) of appear on the DIC, the vehicle below the climate controls.
driving before the system initializes. should be taken in for service.
For more information on the DIC The Traction Control System (TCS)
If cruise control is being used when part of StabiliTrak can be turned
StabiliTrak activates, the cruise messages, see Ride Control
System Messages on page 5‑47. off by pressing and releasing the
control automatically disengages. StabiliTrak button. To disable both
The cruise control can be TCS and StabiliTrak, press and
re-engaged when road conditions
allow. See Cruise Control on hold 5 until F illuminates and the
page 9‑73 for more information. appropriate DIC message displays.
If the system fails to turn on or TCS and StabiliTrak can be turned
activate, the StabiliTrak light on by pressing and releasing the
along with one of the following StabiliTrak button if they are not
The StabiliTrak light will flash on the automatically shut off for any other
messages will be displayed
instrument panel cluster when the reason.
on the Driver Information
system is both on and activated.
Center (DIC): TRACTION

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GMC Sierra Owner Manual - 2011 Black plate (72,1)

9-72 Driving and Operating

When TCS or StabiliTrak is When the transfer case is in 4LO, traction while driving. If traction
turned off, the StabiliTrak light the stability system is automatically control is turned off, only the
and the appropriate message disabled, the StabiliTrak light comes brake-traction control portion
will be displayed on the DIC to on, and the STABILITRAK OFF of traction control will work.
warn the driver. The vehicle will message will appear on the DIC. The engine speed management
still have brake-traction control Both traction control and StabiliTrak will be disabled. In this mode,
when traction control is off, but will are automatically disabled in this engine power is not reduced
not be able to use the engine speed condition. automatically and the driven
management system. See “Traction wheels can spin more freely.
Control Operation” next for more Traction Control Operation This can cause the brake-traction
information. The traction control system is part control to activate constantly.
When the traction control system of the StabiliTrak system. Traction Notice: If the wheel(s) of one axle
has been turned off, system noises control limits wheel spin by reducing is allowed to spin excessively
may still be heard as a result of the engine power to the wheels (engine while the StabiliTrak®, ABS, brake
brake-traction control coming on. speed management) and by warning lights, and any relevant
applying brakes to each individual DIC messages are displayed, the
It is recommended to leave the wheel (brake-traction control) as
system on for normal driving transfer case could be damaged.
necessary. The repairs would not be covered
conditions, but it may be necessary
to turn the system off if the vehicle The traction control system is by the vehicle warranty. Reduce
is stuck in sand, mud, ice or snow, enabled automatically when the engine power and do not spin
and you want to “rock” the vehicle vehicle is started. It will activate the wheel(s) excessively while
to attempt to free it. It may also be and the StabiliTrak light will flash these lights and messages are
necessary to turn off the system if it senses that any of the wheels displayed.
when driving in extreme off-road are spinning or beginning to lose
conditions where high wheel spin
is required. See If the Vehicle is
Stuck on page 9‑23.
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GMC Sierra Owner Manual - 2011 Black plate (73,1)

Driving and Operating 9-73

The traction control system may 2500 and 3500 series vehicles Cruise Control
activate on dry or rough roads with StabiliTrak have a Trailer Sway
or under conditions such as Control (TSC) feature. See Trailer
heavy acceleration while turning Sway Control (TSC) on page 9‑124. { WARNING
or abrupt upshifts/downshifts of the 2500 and 3500 series vehicles
transmission. When this happens, Cruise control can be dangerous
with StabiliTrak have a Hill Start where you cannot drive safely at
a reduction in acceleration may be Assist (HSA) feature. See Hill Start
noticed, or a noise or vibration may a steady speed. So, do not use
Assist (HSA) on page 9‑70. the cruise control on winding
be heard. This is normal.
Adding non‐dealer accessories can roads or in heavy traffic.
If cruise control is being used when affect the vehicle's performance.
the system activates, the StabiliTrak Cruise control can be dangerous
See Accessories and Modifications
light will flash and cruise control will on slippery roads. On such roads,
on page 10‑3.
automatically disengage. Cruise fast changes in tire traction can
control may be reengaged when cause excessive wheel slip, and
road conditions allow. See Cruise Locking Rear Axle you could lose control. Do not use
Control on page 9‑73. Vehicles with a locking rear axle can cruise control on slippery roads.
StabiliTrak may also turn off give more traction on snow, mud,
automatically if it determines that ice, sand, or gravel. It works like a
For vehicles with cruise control, a
a problem exists with the system. standard axle most of the time, but
speed of about 40 km/h (25 mph)
If the problem does not clear itself when traction is low, this feature will
or more can be maintained
after restarting the vehicle, see your allow the rear wheel with the most
without keeping your foot on the
dealer for service. traction to move the vehicle.
accelerator. Cruise control does
not work at speeds below about
40 km/h (25 mph).

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GMC Sierra Owner Manual - 2011 Black plate (74,1)

9-74 Driving and Operating

When the brakes are applied, cruise [ (Cancel): Press to disengage

control is turned off. cruise control without erasing the
For vehicles with an Allison or set speed from memory.
Hydra‐Matic 6‐speed automatic Setting Cruise Control
transmission, see “Grade Braking
and Cruise Grade Braking If the cruise button is on when not in
(Allison Transmission) under use, it could get bumped and go into
Tow/Haul Mode on page 9‑51 cruise when not desired. Keep the
for an explanation of how cruise cruise control switch off when cruise
control interacts with the Range is not being used.
Selection Mode, tow/haul and The cruise control light on the
grade braking systems. instrument panel cluster will come
For vehicles with the StabiliTrak The cruise control buttons are on after the cruise control has been
system that begins to limit wheel located on the left side of the set to the desired speed.
spin while you are using cruise steering wheel.
1. Press I.
control, the cruise control will I (On/Off): Press to turn the
automatically disengage. See system on or off. The indicator light 2. Get up to the desired speed.
StabiliTrak® System on page 9‑70. is on when cruise control is on and 3. Press the SET− button located
When road conditions allow the turns off when cruise control is off. on the steering wheel and
cruise control to be safely used release it.
again, it can be turned back on. + RES (Resume/Accelerate):
Press briefly to resume to a 4. Take your foot off the
previously set speed, or press accelerator.
and hold to accelerate.
SET − (Set/Coast): Press to set
the speed and activate cruise
control or make the vehicle
decelerate.
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GMC Sierra Owner Manual - 2011 Black plate (75,1)

Driving and Operating 9-75

Resuming a Set Speed Reducing Speed While Using Using Cruise Control on Hills
If the cruise control is set at a Cruise Control How well the cruise control will work
desired speed and then the brakes If the cruise control system is on hills depends upon the vehicle
are applied, the cruise control is already activated, speed, load, and the steepness of
disengaged without erasing the . Press and hold the SET– button the hills. While going up steep hills,
set speed from memory. on the steering wheel until the you might have to step on the
Once the vehicle speed reaches desired lower speed is reached, accelerator pedal to maintain the
about 40 km/h (25 mph) or more, then release it. vehicle speed. While going downhill,
press the +RES button on the you might have to brake or shift to
. To slow down in small amounts, a lower gear to keep the vehicle
steering wheel. The vehicle returns press the SET– button on the
to the previous set speed and stays speed down. When the brakes
steering wheel briefly. Each time are applied the cruise control is
there. this is done, the vehicle goes disengaged.
Increasing Speed While Using about 1.6 km/h (1 mph) slower.
Cruise Control Passing Another Vehicle While
If the cruise control system is Using Cruise Control
already activated, Use the accelerator pedal to
. Press and hold the +RES button increase the vehicle speed. When
on the steering wheel until the you take your foot off the pedal,
desired speed is reached, then the vehicle will slow down to the
release it. previous set cruise speed.
. To increase vehicle speed in
small amounts, press the +RES
button. Each time this is done,
the vehicle goes about 1.6 km/h
(1 mph) faster.
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GMC Sierra Owner Manual - 2011 Black plate (76,1)

9-76 Driving and Operating

Ending Cruise Control Object Detection

There are three ways to end cruise
{ WARNING
control:
Systems The Ultrasonic Rear Parking
. To disengage cruise control; Assist (URPA) system does not
Ultrasonic Parking Assist replace driver vision. It cannot
step lightly on the brake pedal.
For vehicles with the Ultrasonic detect:
. Press [ on the steering wheel. Rear Parking Assist (URPA) system, . Objects that are below the
. To turn off the cruise control, it operates at speeds less than
bumper, underneath the
8 km/h (5 mph), and assists the
press I on the steering wheel. vehicle, or too close or far
driver with parking and avoiding
from the vehicle.
Erasing Speed Memory objects while in R (Reverse).
The sensors on the rear bumper . Children, pedestrians,
The cruise control set speed is are used to detect the distance to bicyclists, or pets.
erased from memory by pressing an object up to 2.5 m (8 ft) behind
the I button or if the ignition is If you do not use proper care
the vehicle, and at least 25.4 cm before and while backing, vehicle
turned off. (10 in) off the ground.
damage, injury, or death could
occur. Even with URPA, always
check behind the vehicle before
backing up. While backing, be
sure to look for objects and check
the vehicle's mirrors.

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GMC Sierra Owner Manual - 2011 Black plate (77,1)

Driving and Operating 9-77

How the System Works When the System Does Not

URPA comes on automatically Seem to Work Properly
when the shift lever is moved into The following messages may be
R (Reverse). A single tone sounds displayed on the DIC:
to indicate the system is working.
SERVICE PARK ASSIST: If this
URPA operates only at speeds less The system can be disabled by message occurs, take the vehicle to
than 8 km/h (5 mph). pressing the rear park aid disable your dealer to repair the system.
An obstacle is indicated by audible button located next to the radio. PARK ASSIST OFF: This message
beeps. The interval between the The indicator light comes on and occurs if the driver disables the
beeps becomes shorter as the PARK ASSIST OFF displays on the system.
vehicle gets closer to the obstacle. Driver Information Center (DIC) to PARK ASST BLOCKED SEE
When the distance is less than indicate that URPA is off; see Object OWNERS MANUAL: This
30 cm (12 in) the beeps are Detection System Messages on message can occur under the
continuous. page 5‑46. following conditions:
To be detected, objects must be at Notice: If you use URPA while . The ultrasonic sensors are not
least 25.4 cm (10 in) off the ground the tailgate is lowered, it may clean. Keep the vehicle's rear
and below tailgate level. Objects not detect an object behind your bumper free of mud, dirt, snow,
must also be within 2.5 m (8 ft) from vehicle, and you might back into ice, and slush. For cleaning
the rear bumper. This distance may the object and damage your instructions, see “Washing the
be less during warmer or humid vehicle. Always verify the tailgate Vehicle” under Exterior Care on
weather. is closed when using URPA or page 10‑108.
turn off URPA when driving with
the tailgate lowered.

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GMC Sierra Owner Manual - 2011 Black plate (78,1)

9-78 Driving and Operating

. The park assist sensors are
covered by frost or ice. Frost or
Rear Vision WARNING (Continued)
ice can form around and behind Camera (RVC)
the sensors and may not always This vehicle may have a Rear speed backing maneuvers or
be seen; this can occur after Vision Camera (RVC) system. Read where there could be cross-traffic.
washing the vehicle in cold this entire section before using it. Your judged distances using the
weather. The message may screen will differ from actual
not clear until the frost or ice
has melted. { WARNING distances.
If you do not use proper care
. A trailer was attached to the The Rear Vision Camera (RVC)
before backing up, you could
vehicle, or a bicycle or an object system does not replace driver
hit a vehicle, child, pedestrian,
was hanging out of the tailgate vision. RVC does not:
bicyclist, or pet, resulting in
during the last drive cycle. Once . Detect objects that are vehicle damage, injury, or death.
the attached object is removed
outside the camera's field Even though the vehicle has
and the tailgate is raised, URPA
of view, below the bumper, the RVC system, always check
will return to normal operation.
or underneath the vehicle. carefully before backing up by
. A tow bar is attached to the checking behind and around the
. Detect children, pedestrians,
vehicle. vehicle.
bicyclists, or pets.
. The vehicle's bumper is
Do not back the vehicle by only
damaged. Take the vehicle to
your dealer to repair the system. looking at the RVC screen, or use
the screen during longer, higher
. Other conditions are affecting
(Continued)
system performance. Examples
of this are vibrations from a
jackhammer or the compression
of air brakes on a very large
truck.
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GMC Sierra Owner Manual - 2011 Black plate (79,1)

Driving and Operating 9-79

Vehicles without Navigation To turn the RVC system on again, Turning the Rear Vision Camera
System press and hold z until the left System On or Off
The Rear Vision Camera system is indicator light illuminates. The RVC To turn the RVC system on or off:
designed to help the driver when system display is now enabled and
1. Shift into P (Park).
backing up by displaying a view of the display will appear in the mirror
the area behind the vehicle. When normally. 2. Press the MENU button to enter
the key is in the ON/RUN position the configure menu options,
Vehicles with Navigation then press the MENU hard key
and the driver shifts the vehicle System
into R (Reverse), the video image to select Display or touch the
automatically appears on the inside The RVC system is designed to Display screen button.
rearview mirror. Once the driver help the driver when backing up by 3. Select the Rear Camera Options
shifts out of R (Reverse), the video displaying a view of the area behind screen button. The Rear Camera
image automatically disappears the vehicle. When the driver shifts Options screen will display.
from the inside rearview mirror. the vehicle into R (Reverse), the
video image automatically appears
Turning the Rear Vision Camera on the navigation screen. Once the
System Off or On driver shifts out of R (Reverse), the
To turn off the RVC system, press navigation screen will go back to the
and hold z, located on the inside last screen that had been displayed,
rearview mirror, until the left after a delay.
indicator light turns off. The RVC
display is now disabled.

4. Select the Video screen

button. When the Video screen
button is highlighted the RVC
system is on.
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GMC Sierra Owner Manual - 2011 Black plate (80,1)

9-80 Driving and Operating

The delay after shifting out of ] (Brightness): Touch the + (plus) The symbols appear when an object
R (Reverse) is approximately or – (minus) screen buttons to has been detected by the URPA
10 seconds. The delay can be increase or decrease the brightness system. The symbol may cover the
cancelled by performing one of of the screen. object when viewing the navigation
the following: screen.
_ (Contrast): Touch the + (plus) or
. Pressing a hard key on the – (minus) screen buttons to increase To turn the symbols on or off:
navigation system. or decrease the contrast of the 1. Make sure that URPA has not
. Shifting into P (Park). screen. been disabled.
. Reaching a vehicle speed of Symbols 2. Shift into P (Park).
8 km/h (5 mph). The navigation system may have 3. Press the MENU hard key
There is a message on the rear a feature that lets the driver view to enter the configure menu
vision camera screen that states symbols on the navigation screen options, then press the MENU
“Check Surroundings for Safety.” while using the RVC. The Ultrasonic hard key repeatedly until Display
Rear Park Assist (URPA) system is selected or touch the Display
Adjusting the Brightness and must not be disabled to use the screen button.
Contrast of the Screen caution symbols. If URPA has
4. Select the Rear Camera Options
To adjust the brightness and been disabled and the symbols
screen button. The Rear Camera
contrast of the screen, press the have been turned on, the Rear
Options screen will display.
MENU button while the rear vision Parking Assist Symbols Unavailable
camera image is on the display. error message may display. 5. Touch the Symbols screen
Any adjustments made will only See Ultrasonic Parking Assist on button. The screen button will
affect the rear vision camera screen. page 9‑76. be highlighted when on.

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GMC Sierra Owner Manual - 2011 Black plate (81,1)

Driving and Operating 9-81

Rear Vision Camera Error The camera uses a special lens. The following illustration shows
Messages The distance of the image that the field of view that the camera
appears on the screen differs from provides.
Service Rear Vision Camera the actual distance. The area
System: This message can display displayed by the camera is limited.
when the system is not receiving The camera does not display
information it requires from other objects which are close to either
vehicle systems. corner of the bumper or under the
If any other problem occurs or if a bumper. The area displayed on
problem persists, see your dealer. the screen can vary according
to vehicle orientation or road
Rear Vision Camera Location conditions.

A. View displayed by the camera

B. Corner of the rear bumper

The rear vision camera is located in

the bezel for the tailgate handle.
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GMC Sierra Owner Manual - 2011 Black plate (82,1)

9-82 Driving and Operating

Disconnecting the Rear Vision

Camera
The rear vision camera must be
disconnected if the tailgate needs
to be removed.
To disconnect the camera:
1. Remove the license plate.
2. Disconnect the camera
connectors from the chassis
harness, located behind the
license plate, by pressing on the
release tab on each connector. A. Chassis harness connector A. Chassis harness connector
B. Release tab B. Release tab
C. Camera connector 4. Feed the wiring harness through
3. Plug the two exposed chassis the pickup box, then plug the
harness connectors together to camera connectors together
prevent contamination. to prevent contamination.
5. Remove the tailgate.
See Tailgate on page 2‑10
for more information.
6. Reinstall the license plate.
Reverse this procedure to reinstall
the rear vision camera and make
sure the grommet and connection
are secure.
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GMC Sierra Owner Manual - 2011 Black plate (83,1)

Driving and Operating 9-83

When the System Does Not

. The back of the vehicle is in an . A fast flash may indicate that
Seem to Work Properly accident. If this happens, the the display has been on for the
position and mounting angle maximum allowable time during
The RVC system might not work of the camera can change or a reverse cycle, or the display
properly or display a clear image if: the camera can be affected. has reached an Over
. The RVC is turned off. Be sure to have the camera Temperature limit.
See “Turning the Rear Camera and its position and mounting The fast flash conditions are
System On or Off” earlier in this angle checked at your dealer. used to protect the video
section. The RVC system display in the device from high temperature
. It is dark. rearview mirror may turn off or not conditions. Once conditions
appear as expected due to one return to normal the device will
. The sun or the beam of of the following conditions. If this reset and the green indicator
headlights is shining directly occurs the left indicator light on will stop flashing.
into the camera lens. the mirror will flash. During any of these fault conditions,
. Ice, snow, mud, or anything else . A slow flash may indicate a the display will be blank and the
builds up on the camera lens. loss of video signal, or no video indicator will continue to flash as
Clean the lens, rinse it with signal present during the reverse long as the vehicle is in R (Reverse)
water, and wipe it with a soft cycle. or until the conditions return to
cloth. normal.
Pressing and holding z when the
left indicator light is flashing will turn
off the video display along with the
left indicator light.

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GMC Sierra Owner Manual - 2011 Black plate (84,1)

9-84 Driving and Operating

Fuel See Fuel E85 (85% Ethanol) on

page 9‑87. For all other vehicles,
For diesel engine vehicles, see use only the unleaded gasoline
“Fuel for Diesel Engines” in the described under Recommended
Duramax Diesel Supplement. Fuel on page 9‑84.
For Vehicles with gasoline engines,
please read this. Recommended Fuel
Gasoline For all vehicles except those with
the 6.2L V8 engine (VIN Code 2),
Use of the recommended fuel use regular unleaded gasoline
is an important part of the proper with a posted octane rating of 87 or
maintenance of this vehicle. To help higher. If the octane rating is less
keep the engine clean and maintain The eighth digit of the Vehicle than 87, an audible knocking noise,
optimum vehicle performance, we Identification Number (VIN) shows commonly referred to as spark
recommend the use of gasoline the code letter or number that knock, might be heard when driving.
advertised as TOP TIER Detergent identifies the vehicle's engine. If this occurs, use a gasoline rated
Gasoline. The VIN is at the top left of the at 87 octane or higher as soon
instrument panel. See Vehicle as possible. If heavy knocking is
Look for the TOP TIER label on the
Identification Number (VIN) on heard when using gasoline rated
fuel pump to ensure gasoline meets
page 12‑1. at 87 octane or higher, the engine
enhanced detergency standards
developed by auto companies. A list Vehicles that have a FlexFuel badge needs service.
of marketers providing TOP TIER and a yellow fuel cap can use either
Detergent Gasoline can be found unleaded gasoline or ethanol fuel
at www.toptiergas.com. containing up to 85% ethanol (E85).

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GMC Sierra Owner Manual - 2011 Black plate (85,1)

Driving and Operating 9-85

If the vehicle has the 6.2L V8 engine Gasoline Specifications California Fuel
(VIN Code 2), use premium
unleaded gasoline with a posted
(U.S. and Canada Only) Requirements
octane rating of 91 or higher. At a minimum, gasoline should If the vehicle is certified to meet
You can also use regular unleaded meet ASTM specification California Emissions Standards,
gasoline rated at 87 octane or D 4814 in the United States it is designed to operate on fuels
higher, but the vehicle's acceleration or CAN/CGSB‐3.5 or 3.511 in that meet California specifications.
could be slightly reduced, and Canada. Some gasolines contain See the underhood emission control
a slight audible knocking noise, an octane-enhancing additive called label. If this fuel is not available in
commonly referred to as spark methylcyclopentadienyl manganese states adopting California Emissions
knock, might be heard. If the octane tricarbonyl (MMT). We recommend Standards, the vehicle will operate
is less than 87, you might notice against the use of gasolines satisfactorily on fuels meeting
a heavy knocking noise when you containing MMT. See Fuel Additives federal specifications, but emission
drive. If this occurs, use a gasoline on page 9‑86 for additional control system performance might
rated at 87 octane or higher as soon information. be affected. The malfunction
as possible. Otherwise, you could indicator lamp could turn on and the
damage the engine. If heavy vehicle might fail a smog‐check test.
knocking is heard when using See Malfunction Indicator Lamp on
gasoline rated at 87 octane or page 5‑25. If this occurs, return to
higher, the engine needs service. your authorized dealer for diagnosis.
If it is determined that the condition
is caused by the type of fuel used,
repairs might not be covered by the
vehicle warranty.

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GMC Sierra Owner Manual - 2011 Black plate (86,1)

9-86 Driving and Operating

Fuels in Foreign additive required to meet U.S. Gasolines containing oxygenates,

Environmental Protection Agency such as ethers and ethanol,
Countries regulations. To help keep fuel and reformulated gasolines
Never use leaded gasoline or any injectors and intake valves clean might be available in your area.
other fuel not recommended in the and avoid problems due to dirty We recommend that you use these
previous text on fuel. Costly repairs injectors or valves, look for gasoline gasolines, if they comply with the
caused by use of improper fuel that is advertised as TOP TIER specifications described earlier.
would not be covered by the vehicle Detergent Gasoline. Look for the However, E85 (85% ethanol) and
warranty. TOP TIER label on the fuel pump to other fuels containing more than
ensure gasoline meets enhanced 10% ethanol must not be used in
To check the fuel availability, ask
detergency standards developed vehicles that were not designed
an auto club, or contact a major oil
by the auto companies. A list of for those fuels.
company that does business in the
marketers providing TOP TIER Notice: This vehicle was not
country where you will be driving.
Detergent Gasoline can be found designed for fuel that contains
at www.toptiergas.com.
Fuel Additives methanol. Do not use fuel
For customers who do not use containing methanol. It can
To provide cleaner air, all gasolines TOP TIER Detergent Gasoline corrode metal parts in the fuel
in the United States are now regularly, one bottle of GM Fuel system and also damage plastic
required to contain additives that System Treatment PLUS, added and rubber parts. That damage
help prevent engine and fuel system to the fuel tank at every engine oil would not be covered under the
deposits from forming, allowing the change, can help clean deposits vehicle warranty.
emission control system to work from fuel injectors and intake
properly. In most cases, nothing valves. GM Fuel System Treatment
should have to be added to the fuel. PLUS is the only gasoline additive
However, some gasolines contain recommended by General Motors.
only the minimum amount of It is available at your dealer.

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GMC Sierra Owner Manual - 2011 Black plate (87,1)

Driving and Operating 9-87

Some gasolines that are We encourage the use of E85 in To ensure quick starts in the
not reformulated for low vehicles that are designed to use it. wintertime, the E85 fuel must be
emissions can contain an The ethanol in E85 is a “renewable” formulated properly for your climate
octane-enhancing additive fuel, meaning it is made from according to ASTM specification
called methylcyclopentadienyl renewable sources such as corn D 5798. If you have trouble starting
manganese tricarbonyl (MMT); and other crops. on E85, it could be because the
ask the attendant where you buy Many service stations will not have E85 fuel is not properly formulated
gasoline whether the fuel contains an 85% ethanol fuel (E85) pump for your climate. If this happens,
MMT. We recommend against available. The U.S. Department switching to gasoline or adding
the use of such gasolines. Fuels of Energy has an alternative fuels gasoline to the fuel tank can
containing MMT can reduce website (www.afdc.energy.gov/afdc/ improve starting. For good starting
spark plug life and affect emission locator/stations/) that can help you and heater efficiency below 0°C
control system performance. find E85 fuel. Those stations that (32°F), the fuel mix in the fuel tank
The malfunction indicator lamp do have E85 should have a label should contain no more than 70%
might turn on. If this occurs, indicating ethanol content. Do not ethanol. It is best not to alternate
return to your dealer for service. use the fuel if the ethanol content is repeatedly between gasoline and
greater than 85%. E85. If you do switch fuels, it is
Fuel E85 (85% Ethanol) recommended that you add as
At a minimum, E85 should meet much fuel as possible — do not
Vehicles that have a FlexFuel badge ASTM Specification D 5798. add less than 11 L (3 gal) when
and a yellow fuel cap can use either By definition, this means that fuel refueling. You should drive the
unleaded gasoline or ethanol fuel labeled E85 will have an ethanol vehicle immediately after refueling
containing up to 85% ethanol (E85). content between 70% and 85%. for at least 11 km (7 mi) to allow
For all other vehicles, use only the Filling the fuel tank with fuel the vehicle to adapt to the change
unleaded gasoline described under mixtures that do not meet ASTM in ethanol concentration.
Recommended Fuel on page 9‑84. specifications can affect driveability
and could cause the malfunction
indicator lamp to come on.
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GMC Sierra Owner Manual - 2011 Black plate (88,1)

9-88 Driving and Operating

E85 has less energy per liter Filling the Tank

(gallon) than gasoline, so you will
need to refill the fuel tank more If the vehicle has a diesel engine,
often when using E85 than when see the Duramax diesel supplement
you are using gasoline. See Filling for more information.
the Tank on page 9‑88.
Notice: Some additives are not { WARNING
compatible with E85 fuel and can Fuel vapor burns violently and a
harm the vehicle's fuel system.
fuel fire can cause bad injuries.
Do not add anything to E85.
To help avoid injuries to you and
Damage caused by additives
would not be covered by the others, read and follow all the
vehicle warranty. instructions on the fuel pump
The tethered fuel cap is located
island. Turn off the engine when
Notice: This vehicle was not behind a hinged fuel door on the
refueling. Do not smoke near fuel
designed for fuel that contains driver side of the vehicle. Vehicles
or when refueling the vehicle. that have a FlexFuel badge and
methanol. Do not use fuel Do not use cellular phones. Keep
containing methanol. It can a yellow fuel cap can use either
sparks, flames, and smoking unleaded gasoline or ethanol fuel
corrode metal parts in the fuel
materials away from fuel. Do not containing up to 85% ethanol (E85).
system and also damage plastic
leave the fuel pump unattended See Fuel E85 (85% Ethanol) on
and rubber parts. That damage
would not be covered under the when refueling the vehicle. This is page 9‑87.
vehicle warranty. against the law in some places.
To remove the fuel cap, turn it
Do not re-enter the vehicle while
slowly counterclockwise.
pumping fuel. Keep children away
from the fuel pump; never let
children pump fuel.

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GMC Sierra Owner Manual - 2011 Black plate (89,1)

Driving and Operating 9-89

pumping before removing the

{ WARNING nozzle. Clean fuel from painted { WARNING
surfaces as soon as possible.
Fuel can spray out on you if you See Exterior Care on page 10‑108. If a fire starts while you are
open the fuel cap too quickly. refueling, do not remove the
If you spill fuel and then When replacing the fuel cap, turn it nozzle. Shut off the flow of fuel
something ignites it, you could be clockwise until it clicks. It will require by shutting off the pump or by
badly burned. This spray can more effort to turn the fuel cap on notifying the station attendant.
happen if the tank is nearly full, the last turn as you tighten it. Make Leave the area immediately.
sure the cap is fully installed. The
and is more likely in hot weather.
diagnostic system can determine if
Open the fuel cap slowly and wait Notice: If a new fuel cap is
the fuel cap has been left off or
for any hiss noise to stop. Then improperly installed. This would needed, be sure to get the right
unscrew the cap all the way. allow fuel to evaporate into the type of cap from your dealer.
atmosphere. See Malfunction The wrong type of fuel cap might
If the vehicle is a dual fuel tank Indicator Lamp on page 5‑25. not fit properly, might cause the
chassis cab model, and it runs out malfunction indicator lamp to
The TIGHTEN GAS CAP message
of fuel, refuel the front fuel tank first light, and could damage the
displays on the Driver Information
to ensure a quick restart. fuel tank and emissions system.
Center (DIC) if the fuel cap is not
See Malfunction Indicator Lamp
Be careful not to spill fuel. Do not properly installed. See Fuel System
on page 5‑25.
top off or overfill the tank and wait a Messages on page 5‑46 for more
few seconds after you have finished information.

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GMC Sierra Owner Manual - 2011 Black plate (90,1)

9-90 Driving and Operating

Filling a Portable Fuel WARNING (Continued) Towing

Container
General Towing
. Bring the fill nozzle in contact
{ WARNING with the inside of the fill Information
Never fill a portable fuel container opening before operating Only use towing equipment that
while it is in the vehicle. Static the nozzle. Contact should has been designed for the vehicle.
electricity discharge from the be maintained until the filling Contact your dealer or trailering
container can ignite the fuel is complete. dealer for assistance with preparing
vapor. You can be badly burned the vehicle for towing a trailer.
. Do not smoke while
and the vehicle damaged if this pumping fuel. See the following trailer towing
occurs. To help avoid injury to information in this section:
. Do not use a cellular phone
you and others: while pumping fuel. . For information on driving
. Dispense fuel only into while towing a trailer, see
approved containers. “Driving Characteristics and
Towing Tips.”
. Do not fill a container while
it is inside a vehicle, in a . For maximum vehicle and trailer
vehicle's trunk, pickup bed, weights, see “Trailer Towing.”
or on any surface other than . For information on equipment
the ground. to tow a trailer, see “Towing
(Continued) Equipment.”

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GMC Sierra Owner Manual - 2011 Black plate (91,1)

Driving and Operating 9-91

For information on towing a disabled

. Consider using a sway control. . Vehicles can tow in D (Drive).
vehicle, see Towing the Vehicle on See “Hitches” under Towing Shift the transmission to a lower
page 10‑103. For information on Equipment on page 9‑112. gear if the transmission shifts
towing the vehicle behind another . Do not tow a trailer at all during too often under heavy loads
vehicle such as a motor home, see the first 800 km (500 miles) and/or hilly conditions.
Recreational Vehicle Towing on the new vehicle is driven. Important considerations that have
page 10‑103. The engine, axle, or other to do with weight:
parts could be damaged. . Weight of the trailer
Driving Characteristics . During the first 800 km
and Towing Tips
. Weight of the trailer tongue
(500 miles) that a trailer is
towed, do not drive over . Weight on the vehicle's tires
Pulling a Trailer 80 km/h (50 mph) and do . Weight of the trailering
Important points for pulling a trailer: not make starts at full throttle. combination
. There are many different laws, This helps the engine and other
including speed limit restrictions, parts of the vehicle wear in at
having to do with trailering. the heavier loads.
Make sure the rig will be legal,
not only where you live but
also where you will be driving.
A good source for this
information can be state
or provincial police.

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GMC Sierra Owner Manual - 2011 Black plate (92,1)

9-92 Driving and Operating

Driving with a Trailer Before starting, check all trailer

WARNING (Continued) hitch parts and attachments, safety
{ WARNING . Fully open the air outlets
chains, electrical connectors,
lamps, tires, and mirrors. If the
on or under the instrument trailer has electric brakes, start the
When towing a trailer, exhaust panel.
gases may collect at the rear combination moving and then apply
of the vehicle and enter if the
. Adjust the Climate Control the trailer brake controller by hand
liftgate, trunk/hatch, or rear-most system to a setting that to be sure the brakes work.
window is open. brings in only outside air During the trip, check occasionally
and set the fan speed to the to be sure that the load is secure
Engine exhaust contains Carbon highest setting. See Climate and the lamps and any trailer
Monoxide (CO) which cannot be Control System in the Index. brakes still work.
seen or smelled. It can cause
For more information about
unconsciousness and even death.
Carbon Monoxide, see Engine Following Distance
To maximize safety when towing Exhaust on page 9‑44. Stay at least twice as far behind the
a trailer: vehicle ahead as you would when
driving the vehicle without a trailer.
. Have the exhaust system Towing a trailer requires a
This can help to avoid heavy
inspected for leaks and make certain amount of experience.
braking and sudden turns.
necessary repairs before The combination you are driving is
starting a trip. longer and not as responsive as the
. Never drive with the liftgate, vehicle itself. Get acquainted with
trunk/hatch, or rear-most the handling and braking of the rig
window open. before setting out for the open road.
(Continued)

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GMC Sierra Owner Manual - 2011 Black plate (93,1)

Driving and Operating 9-93

Passing Making Turns Driving on Grades

More passing distance is Notice: Making very sharp turns Reduce speed and shift to a
needed when towing a trailer. while trailering could cause the lower gear before starting down
The combination will not accelerate trailer to come in contact with a long or steep downgrade. If the
as quickly and is longer so it is the vehicle. The vehicle could be transmission is not shifted down,
necessary to go much farther damaged. Avoid making very the brakes might get hot and no
beyond the passed vehicle before sharp turns while trailering. longer work well.
returning to the lane. When turning with a trailer, Vehicles can tow in D (Drive).
Backing Up make wider turns than normal. Shift the transmission to a lower
Do this so the trailer will not strike gear if the transmission shifts too
Hold the bottom of the steering soft shoulders, curbs, road signs, often under heavy loads and/or
wheel with one hand. To move the trees, or other objects. Avoid jerky hilly conditions.
trailer to the left, move that hand or sudden maneuvers. Signal well
to the left. To move the trailer to The Tow/Haul Mode may be used
in advance. if the transmission shifts too often.
the right, move your hand to the
right. Always back up slowly and, If the trailer turn signal bulbs burn See Tow/Haul Mode on page 9‑51.
if possible, have someone out, the arrows on the instrument When towing at high altitude on
guide you. panel will still flash for turns. It is steep uphill grades, consider the
important to check occasionally to following: Engine coolant will boil
be sure the trailer bulbs are still at a lower temperature than at
working. normal altitudes. If the engine is
turned off immediately after towing
at high altitude on steep uphill
grades, the vehicle may show
signs similar to engine overheating.

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GMC Sierra Owner Manual - 2011 Black plate (94,1)

9-94 Driving and Operating

To avoid this, let the engine If parking the rig on a hill:

run while parked, preferably on 1. Press the brake pedal, but
{ WARNING
level ground, with the automatic do not shift into P (Park) yet.
transmission in P (Park) for a few It can be dangerous to get out of
Turn the wheels into the curb if the vehicle if the shift lever is not
minutes before turning the engine facing downhill or into traffic if
off. If the overheat warning comes fully in P (Park) with the parking
facing uphill. brake firmly set. The vehicle
on, see Engine Overheating on
page 10‑25. 2. Have someone place chocks can roll.
under the trailer wheels. If the engine has been left
Parking on Hills
3. When the wheel chocks are in running, the vehicle can move
place, release the regular brakes suddenly. You or others could be
{ WARNING until the chocks absorb the load. injured. To be sure the vehicle will
Parking the vehicle on a hill 4. Reapply the brake pedal. Then not move, even when on fairly
with the trailer attached can be apply the parking brake and shift level ground, use the steps that
dangerous. If something goes into P (Park). follow.
wrong, the rig could start to move. 5. If the vehicle is four-wheel-drive, Always put the shift lever fully in
People can be injured, and both be sure the transfer case is in a P (Park) with the parking brake
the vehicle and the trailer can be drive gear and not in N (Neutral). firmly set.
damaged. When possible, always
6. Release the brake pedal. If the transfer case on a
park the rig on a flat surface.
four-wheel-drive vehicle is in
N (Neutral), the vehicle will be
free to roll, even if the shift lever
is in P (Park). Be sure the transfer
case is in a drive gear — not in
N (Neutral).

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GMC Sierra Owner Manual - 2011 Black plate (95,1)

Driving and Operating 9-95

Leaving After Parking on a Hill Trailer Towing WARNING (Continued)

1. Apply and hold the brake pedal. If the vehicle has a diesel engine,
2. Start the engine. see the Duramax diesel supplement vehicle warranty. Pull a trailer
3. Shift into a gear. for more information. only if all the steps in this section
4. Release the parking brake.
If the vehicle is a hybrid, see have been followed. Ask your
5. Let up on the brake pedal.
6. Drive slowly until the trailer is the hybrid supplement for more dealer for advice and information
clear of the chocks. information. about towing a trailer with the
7. Stop and have someone pick up Do not tow a trailer during break‐in. vehicle.
and store the chocks. See New Vehicle Break-In on
page 9‑34 for more information. Notice: Pulling a trailer
Maintenance when Trailer
improperly can damage the
Towing
The vehicle needs service more
{ WARNING vehicle and result in costly
repairs not covered by the
often when pulling a trailer. See this The driver can lose control when vehicle warranty. To pull a trailer
manual's Maintenance Schedule pulling a trailer if the correct correctly, follow the advice in
or Index for more information. equipment is not used or the this section and see your dealer
Things that are especially important vehicle is not driven properly. for important information about
in trailer operation are automatic For example, if the trailer is too towing a trailer with the vehicle.
transmission fluid, engine oil, axle heavy, the brakes may not work To identify the trailering capacity of
lubricant, belts, cooling system, well or even at all. The driver and the vehicle, read the information in
and brake system. It is a good passengers could be seriously “Weight of the Trailer” later in this
idea to inspect these before injured. The vehicle may also be section.
and during the trip.
damaged; the resulting repairs
Check periodically to see that all would not be covered by the
hitch nuts and bolts are tight. (Continued)
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GMC Sierra Owner Manual - 2011 Black plate (96,1)

9-96 Driving and Operating

Trailering is different than just Weight of the Trailer Trailer weight rating (TWR) is
driving the vehicle by itself. calculated assuming the tow vehicle
How heavy can a trailer safely be?
Trailering means changes in has only the driver but all required
handling, acceleration, braking, It depends on how the rig is used. trailering equipment. Weight of
durability, and fuel economy. Speed, altitude, road grades, additional optional equipment,
Successful, safe trailering takes outside temperature, and how much passengers, and cargo in the tow
correct equipment, and it has to the vehicle is used to pull a trailer vehicle must be subtracted from
be used properly. are all important. It can depend the trailer weight rating.
on any special equipment on the
The following information has many Use the following chart to determine
vehicle, and the amount of tongue
time-tested, important trailering tips how much the vehicle can weigh,
weight the vehicle can carry. See
and safety rules. Many of these are based upon the vehicle model and
“Weight of the Trailer Tongue” later
important for your safety and that of options.
in this section for more information.
your passengers. So please read Weights listed apply for
this section carefully before pulling conventional trailers and fifth-wheel
a trailer. trailers unless otherwise noted.

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GMC Sierra Owner Manual - 2011 Black plate (97,1)

Driving and Operating 9-97

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

1500 Series 2WD Regular Cab Standard Box (b)
4.3L V6 (c) 3.23 2 177 kg (4,800 lbs) 4 309 kg (9,500 lbs)
4.3L V6 — With Automatic
3.73 2 449 kg (5,400 lbs) 4 536 kg (10,000 lbs)
Transmission (c)
4.8L V8 (c) 3.23 2 132 kg (4,700 lbs) 4 309 kg (9,500 lbs)
4.8L V8 3.73 3 266 kg (7,200 lbs) 5 443 kg (12,000 lbs)
5.3L LMG V8 3.08 2 994 kg (6,600 lbs) 5 216 kg (11,500 lbs)
5.3L LMG V8, K5L HD
3.08 3 357 kg (7,400 lbs) 5 534 kg (12,200 lbs)
Cooling Pkg
5.3L LMG V8 K5L HD Cooling Pkg 3.42 4 128 kg (9,100 lbs) 6 350 kg (14,000 lbs)
5.3L LMG V8 K5L HD Cooling Pkg
3.42 4 128 kg (9,100 lbs) 6 350 kg (14,000 lbs)
Conventional Trailer
5.3L LMG V8 K5L HD Cooling Pkg
3.42 4 128 kg (9,100 lbs) 6 350 kg (14,000 lbs)
Fifth-Wheel Trailer
1500 Series 2WD Extended Cab Standard Box (b)
4.3L V6 (c) 3.23 1 996 kg (4,400 lbs) 4 309 kg (9,500 lbs)
4.8L V8 (c) 3.23 2 132 kg (4,700 lbs) 4 536 kg (10,000 lbs)
4.8L V8 3.73 3 039 kg (6,700 lbs) 5 443 kg (12,000 lbs)

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GMC Sierra Owner Manual - 2011 Black plate (98,1)

9-98 Driving and Operating

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

5.3L V8 3.08 2 812 kg (6,200 lbs) 5 216 kg (11,500 lbs)
5.3L V8 K5L HD Cooling Pkg 3.08 3 130 kg (6,900 lbs) 5 534 kg (12,200 lbs)
5.3L V8 K5L HD Cooling
3.42 4 400 kg (9,700 lbs) 6 804 kg (15,000 lbs)
Pkg — Conventional Trailer
5.3L V8 K5L HD Cooling
3.42 4 173 kg (9,200 lbs) 6 804 kg (15,000 lbs)
Pkg — Fifth-Wheel Trailer
6.2L V8 K5L HD Cooling
3.42 4 400 kg (9,700 lbs) 6 804 kg (15,000 lbs)
Pkg — Conventional Trailer
6.2L V8 K5L HD Cooling
3.42 4 218 kg (9,300 lbs) 6 804 kg (15,000 lbs)
Pkg — Fifth-Wheel Trailer
6.2L V8 NHT Max Trailering
3.73 4 853 kg (10,700 lbs) 7 257 kg (16,000 lbs)
Pkg — Conventional Trailer
6.2L V8 NHT Max Trailering
3.73 4 627 kg (10,200 lbs) 7 257 kg (16,000 lbs)
Pkg — Fifth-Wheel Trailer
1500 Series 2WD Crew Cab Short Box (c)
4.8L V8 3.23 2 132 kg (4,700 lbs) 4 536 kg (10,000 lbs)
4.8L V8 3.73 3 039 kg (6,700 lbs) 5 443 kg (12,000 lbs)
5.3L V8 (LMG) 3.08 2 767 kg (6,100 lbs) 5 216 kg (11,500 lbs)

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GMC Sierra Owner Manual - 2011 Black plate (99,1)

Driving and Operating 9-99

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

5.3L V8 (LMG) K5L HD
3.08 3 084 kg (6,800 lbs) 5 534 kg (12,200 lbs)
Cooling Pkg
5.3L V8 K5L HD Cooling
3.08 3 175 kg (7,000 lbs) 5 534 kg (12,200 lbs)
Pkg (XFE)
5.3L V8 K5L HD Cooling Pkg 3.42 4 355 kg (9,600 lbs) 6 804 kg (15,000 lbs)
6.2L V8 3.42 3 039 kg (6,700 lbs) 5 443 kg (12,000 lbs)
6.2L V8 K5L HD Cooling Pkg 3.42 4 400 kg (9,700 lbs) 6 804 kg (15,000 lbs)
6.2L V8 NHT Max Trailering Pkg 3.73 4 808 kg (10,600 lbs) 7 257 kg (16,000 lbs)
1500 Series 2WD Regular Cab Long Box (b)
4.3L V6 (c) 3.23 2 132 kg (4,700 lbs) 4 309 kg (9,500 lbs)
4.3L V6 (c) 3.73 2 359 kg (5,200 lbs) 4 536 kg (10,000 lbs)
4.8L V8 (c) 3.23 2 313 kg (5,100 lbs) 4 536 kg (10,000 lbs)
4.8L V8 3.73 3 221 kg (7,100 lbs) 5 443 kg (12,000 lbs)
5.3L V8 K5L HD Cooling Pkg 3.08 3 266 kg (7,200 lbs) 5 534 kg (12,200 lbs)
5.3L V8 3.42 2 948 kg (6,500 lbs) 5 216 kg (11,500 lbs)

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GMC Sierra Owner Manual - 2011 Black plate (100,1)

9-100 Driving and Operating

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

5.3L V8 K5L HD Cooling
3.42 4 536 kg (10,000 lbs) 6 804 kg (15,000 lbs)
Pkg — Conventional Trailer
5.3L V8 K5L HD Cooling
3.42 3 992 kg (8,800 lbs) 6 804 kg (15,000 lbs)
Pkg — Fifth-Wheel Trailer
1500 Series 2WD Extended Cab Long Box (b)
5.3L V8 3.08 2 722 kg (6,000 lbs) 5 216 kg (11,500 lbs)
5.3L V8 K5L HD Cooling Pkg 3.08 3 039 kg (6,700 lbs) 5 534 kg (12,200 lbs)
5.3L V8 K5L HD Cooling
3.42 4 309 kg (9,500 lbs) 6 804 kg (15,000 lbs)
Pkg — Conventional Trailer
5.3L V8 K5L HD Cooling
3.42 4 037 kg (8,900 lbs) 6 804 kg (15,000 lbs)
Pkg — Fifth-Wheel Trailer
1500 Series 4WD Regular Cab Standard Box (b)
4.3L V6 (c) 3.73 2 313 kg (5,100 lbs) 4 536 kg (10,000 lbs)
4.8L V8 (c) 3.42 2 722 kg (6,000 lbs) 4 990 kg (11,000 lbs)
5.3L V8 (c) 3.08 2 903 kg (6,400 lbs) 5 216 kg (11,500 lbs)
5.3L V8 K5L HD Cooling Pkg 3.08 3 221 kg (7,100 lbs) 5 534 kg (12,200 lbs)

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GMC Sierra Owner Manual - 2011 Black plate (101,1)

Driving and Operating 9-101

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

5.3L V8 K5L HD Cooling
3.42 4 037 kg (8,900 lbs) 6 350 kg (14,000 lbs)
Pkg — Conventional Trailer
5.3L V8 K5L HD Cooling
3.42 3 674 kg (8,100 lbs) 6 350 kg (14,000 lbs)
Pkg — Fifth-Wheel Trailer
1500 Series 4WD Extended Cab Standard Box (b)
4.8L V8 (c) 3.42 2 495 kg (5,500 lbs) 4 990 kg (11,000 lbs)
5.3L V8 (c) 3.08 2 767 kg (6,100 lbs) 5 216 kg (11,500 lbs)
5.3L V8 K5L HD Cooling Pkg (c) 3.08 3 084 kg (6,800 lbs) 5 534 kg (12,200 lbs)
5.3L V8 K5L HD Cooling Pkg 3.42 4 354 kg (9,600 lbs) 6 804 kg (15,000 lbs)
6.2L V8 K5L HD Cooling
3.42 4 264 kg (9,400 lbs) 6 804 kg (15,000 lbs)
Pkg — Conventional Trailer
6.2L V8 K5L HD Cooling
3.42 4 037 kg (8,900 lbs) 6 804 kg (15,000 lbs)
Pkg — Fifth-Wheel Trailer
6.2L V8 NHT Max Trailering
3.73 4 717 kg (10,400 lbs) 7 257 kg (16,000 lbs)
Pkg — Conventional Trailer
6.2L V8 NHT Max Trailering
3.73 4 491 kg (9,900 lbs) 7 257 kg (16,000 lbs)
Pkg — Fifth-Wheel Trailer

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GMC Sierra Owner Manual - 2011 Black plate (102,1)

9-102 Driving and Operating

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

1500 Series 4WD Crew Cab Short Box (c)
4.8L V8 3.42 2 495 kg (5,500 lbs) 4 990 kg (11,000 lbs)
5.3L V8 3.08 2 722 kg (6,000 lbs) 5 216 kg (11,500 lbs)
5.3L V8 K5L HD Cooling Pkg 3.08 3 039 kg (6,700 lbs) 5 534 kg (12,200 lbs)
5.3L V8 K5L HD Cooling Pkg 3.42 4 309 kg (9,500 lbs) 6 804 kg (15,000 lbs)
6.2L V8 3.42 2 903 kg (6,400 lbs) 5 443 kg (12,000 lbs)
6.2L V8 K5L HD Cooling Pkg 3.42 4 264 kg (9,400 lbs) 6 804 kg (15,000 lbs)
6.2L V8 NHT Max Trailering Pkg 3.73 4 717 kg (10,400 lbs) 7 257 kg (16,000 lbs)
1500 Series 4WD Regular Cab Long Box (b)
4.3L V6 (c) 3.73 2 223 kg (4,900 lbs) 4 536 kg (10,000 lbs)
4.8L V8 (c) 3.42 2 631 kg (5,800 lbs) 4 990 kg (11,000 lbs)
5.3L V8 (c) 3.08 2 858 kg (6,300 lbs) 5 216 kg (11,500 lbs)
5.3L V8 K5L HD Cooling Pkg 3.08 3 175 kg (7,000 lbs) 5 534 kg (12,200 lbs)
5.3L V8 K5L HD Cooling
3.42 4 445 kg (9,800 lbs) 6 804 kg (15,000 lbs)
Pkg — Conventional Trailer
5.3L V8 K5L HD Cooling
3.42 4 400 kg (9,700 lbs) 6 804 kg (15,000 lbs)
Pkg — Fifth-Wheel Trailer

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GMC Sierra Owner Manual - 2011 Black plate (103,1)

Driving and Operating 9-103

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

1500 Series 4WD Extended Cab Long Box (b)
5.3L V8 (c) 3.08 2 631 kg (5,800 lbs) 5 216 kg (11,500 lbs)
5.3L V8 K5L HD Cooling Pkg (c) 3.08 2 948 kg (6,500 lbs) 5 534 kg (12,200 lbs)
5.3L V8 K5L HD Cooling
3.42 4 218 kg (9,300 lbs) 6 804 kg (15,000 lbs)
Pkg — Conventional Trailer
5.3L V8 K5L HD Cooling
3.42 3 629 kg (8,000 lbs) 6 804 kg (15,000 lbs)
Pkg — Fifth-Wheel Trailer
2500 Series 2WD Extended Cab Standard Box HD (d)
6.0L V8 3.73 4 445 kg (9,800 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 486 kg (14,300 lbs) 9 299 kg (20,500 lbs)
2500 Series 2WD Crew Cab Standard Box HD (d)
6.0L V8 3.73 4 400 kg (9,700 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 441 kg (14,200 lbs) 9 299 kg (20,500 lbs)

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GMC Sierra Owner Manual - 2011 Black plate (104,1)

9-104 Driving and Operating

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

2500 Series 2WD Regular Cab Long Box HD (d)
6.0L V8 3.73 4 627 kg (10,200 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Payload Performance
3.73 4 536 kg (10,000 lbs) 7 257 kg (16,000 lbs)
Pkg (UB7)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 668 kg (14,700 lbs) 9 299 kg (20,500 lbs)
2500 Series 2WD Extended Cab Long Box HD (d)
6.0L V8 3.73 4 400 kg (9,700 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 441 kg (14,200 lbs) 9 299 kg (20,500 lbs)
2500 Series 2WD Crew Cab Long Box HD (d)
6.0L V8 3.73 4 354 kg (9,600 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 396 kg (14,100 lbs) 9 299 kg (20,500 lbs)

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GMC Sierra Owner Manual - 2011 Black plate (105,1)

Driving and Operating 9-105

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

2500 Series 4WD Extended Cab Standard Box HD (d)
6.0L V8 3.73 4 309 kg (9,500 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 350 kg (14,000 lbs) 9 299 kg (20,500 lbs)
2500 Series 4WD Crew Cab Standard Box HD (d)
6.0L V8 3.73 4 264 kg (9,400 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 305 kg (13,900 lbs) 9 299 kg (20,500 lbs)
2500 Series 4WD Regular Cab Long Box HD (d)
6.0L V8 3.73 4 491 kg (9,900 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 532 kg (14,400 lbs) 9 299 kg (20,500 lbs)
2500 Series 4WD Extended Cab Long Box HD (d)
6.0L V8 3.73 4 264 kg (9,400 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 305 kg (13,900 lbs) 9 299 kg (20,500 lbs)

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GMC Sierra Owner Manual - 2011 Black plate (106,1)

9-106 Driving and Operating

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

2500 Series 4WD Crew Cab Long Box HD (d)
6.0L V8 3.73 4 218 kg (9,300 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 260 kg (13,800 lbs) 9 299 kg (20,500 lbs)
3500 Series 2WD Regular Cab (e)
6.0L V8 (Single Rear Wheels)
4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
Conventional Trailer
6.0L V8 (Single Rear Wheels)
4.10 6 577 kg (14,500 lbs) 9 299 kg (20,500 lbs)
Fifth-Wheel Trailer
6.0L V8 (Dual Rear Wheels) 3.73 4 354 kg (9,600 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Dual Rear Wheels) 4.10 6 396 kg (14,100 lbs) 9 299 kg (20,500 lbs)
3500 Series 2WD Extended Cab (e)
6.0L V8 (Single Rear Wheels) 3.73 4 309 kg (9,500 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Single Rear Wheels)
4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
Conventional Trailer
6.0L V8 (Single Rear Wheels)
4.10 6 350 kg (14,000 lbs) 9 299 kg (20,500 lbs)
Fifth-Wheel Trailer

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GMC Sierra Owner Manual - 2011 Black plate (107,1)

Driving and Operating 9-107

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

6.0L V8 (Dual Rear Wheels) 3.73 4 128 kg (9,100 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Dual Rear Wheels) 4.10 6 169 kg (13,600 lbs) 9 299 kg (20,500 lbs)
3500 Series 2WD Crew Cab Standard Box (e)
6.0L V8 3.73 4 309 kg (9,500 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 Fifth-Wheel Trailer 4.10 6 350 kg (14,000 lbs) 9 299 kg (20,500 lbs)
3500 Series 2WD Crew Cab Long Box (e)
6.0L V8 (Single Rear Wheels) 3.73 4 264 kg (9,400 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Single Rear Wheels)
4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
Conventional Trailer
6.0L V8 (Single Rear Wheels)
4.10 6 305 kg (13,900 lbs) 9 299 kg (20,500 lbs)
Fifth-Wheel Trailer
6.0L V8 (Dual Rear Wheels) 3.73 4 082 kg (9,000 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Dual Rear Wheels) 4.10 6 123 kg (13,500 lbs) 9 299 kg (20,500 lbs)
3500 Series 4WD Regular Cab (e)
6.0L V8 (Single Rear Wheels) 3.73 4 400 kg (9,700 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Single Rear Wheels)
4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
Conventional Trailer

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GMC Sierra Owner Manual - 2011 Black plate (108,1)

9-108 Driving and Operating

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

6.0L V8 (Single Rear Wheels)
4.10 6 441 kg (14,200 lbs) 9 299 kg (20,500 lbs)
Fifth-Wheel Trailer
6.0L V8 (Dual Rear Wheels) 3.73 4 218 kg (9,300 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Dual Rear Wheels) 4.10 6 260 kg (13,800 lbs) 9 299 kg (20,500 lbs)
3500 Series 4WD Extended Cab (e)
6.0L V8 (Single Rear Wheels) 3.73 4 173 kg (9,200 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Single Rear Wheels)
4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
Conventional Trailer
6.0L V8 (Single Rear Wheels)
4.10 6 214 kg (13,700 lbs) 9 299 kg (20,500 lbs)
Fifth-Wheel Trailer
6.0L V8 (Dual Rear Wheels) 3.73 4 037 kg (8,900 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Dual Rear Wheels) 4.10 6 078 kg (13,400 lbs) 9 299 kg (20,500 lbs)
3500 Series 4WD Crew Cab Standard Box (e)
6.0L V8 3.73 4 173 kg (9,200 lbs) 7 257 kg (16,000 lbs)
6.0L V8 — Conventional Trailer 4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
6.0L V8 — Fifth-Wheel Trailer 4.10 6 214 kg (13,700 lbs) 9 299 kg (20,500 lbs)

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GMC Sierra Owner Manual - 2011 Black plate (109,1)

Driving and Operating 9-109

Vehicle Axle Ratio Maximum Trailer Weight GCWR (a)

3500 Series 4WD Crew Cab Long Box (e)
6.0L V8 (Single Rear Wheels) 3.73 4 128 kg (9,100 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Single Rear Wheels)
4.10 5 897 kg (13,000 lbs) 9 299 kg (20,500 lbs)
Conventional Trailer
6.0L V8 (Single Rear Wheels)
4.10 6 169 kg (13,600 lbs) 9 299 kg (20,500 lbs)
Fifth-Wheel Trailer
6.0L V8 (Dual Rear Wheels) 3.73 3 946 kg (8,700 lbs) 7 257 kg (16,000 lbs)
6.0L V8 (Dual Rear Wheels) 4.10 5 987 kg (13,200 lbs) 9 299 kg (20,500 lbs)
(a) The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle
and trailer including any passengers, cargo, equipment, and conversions. The GCWR for the vehicle should not be
exceeded.
(b) Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to
680 kg (1,500 lbs) maximum.
(c) This model is neither designed nor intended to tow fifth-wheel or gooseneck trailers.
(d) Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to
1 361 kg (3,000 lbs) maximum.
(e) Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to
1 587 kg (3,500 lbs) maximum.

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GMC Sierra Owner Manual - 2011 Black plate (110,1)

9-110 Driving and Operating

Ask your dealer for trailering vehicle, any cargo carried in it, and
information or advice, or write us at the people who will be riding in the
our Customer Assistance Offices. vehicle as well as trailer tongue
See Customer Assistance Offices weight. Vehicle options, equipment,
(U.S. and Canada) on page 13‑5 passengers and cargo in the vehicle
or Customer Assistance Offices reduce the amount of tongue weight
(Mexico) on page 13‑5 for more the vehicle can carry, which will also
information. reduce the trailer weight the vehicle
can tow. See “ Vehicle Load Limits”
Weight of the Trailer Tongue for more information about the
The tongue load (A) of any vehicle's maximum load capacity.
trailer is very important because
it is also part of the vehicle weight.
Trailer tongue weight (A) should be
The Gross Vehicle Weight (GVW)
10 to 15 percent and fifth-wheel or
includes the curb weight of the
gooseneck kingpin weight should be
15 to 25 percent of the loaded trailer
weight up to the maximums for
vehicle series and hitch type
shown here:

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GMC Sierra Owner Manual - 2011 Black plate (111,1)

Driving and Operating 9-111

Maximum Tongue After loading the trailer, weigh

Vehicle Series Hitch Type Weight the trailer and then the tongue,
separately, to see if the weights are
1500 Weight Carrying 272 kg (600 lbs) proper. If they are not, adjustments
2500HD/3500 Weight Carrying 453 kg (1,000 lbs) might be made by moving some
items around in the trailer.
1500 Weight Distributing 499 kg (1,100 lbs)
Total Weight on the Vehicle's
2500HD/3500 Weight Distributing 680 kg (1,500 lbs) Tires
1500 Fifth-Wheel Gooseneck 680 kg (1,500 lbs) Be sure the vehicle's tires are
2500HD Fifth-Wheel Gooseneck 1 134 kg (2,500 lbs) inflated to the inflation pressures
found on the Certification Tire label
3500 Single Rear on the drivers door or see Vehicle
Fifth-Wheel Gooseneck 1 360 kg (3,000 lbs)
Wheels Load Limits on page 9‑25 for more
3500 Dual Rear information. Make sure not to
Fifth-Wheel Gooseneck 1 587 kg (3,500 lbs) exceed the GVWR limit for the
Wheels
vehicle, or the RGAWR, with the
tow vehicle and trailer fully loaded
Do not exceed the maximum Trailering may be limited by the for the trip including the weight
allowable tongue weight for the vehicle's ability to carry tongue of the trailer tongue. If using a
vehicle. Choose the shortest hitch weight. Tongue or kingpin weight weight-distributing hitch, make
extension that will position the hitch cannot cause the vehicle to exceed sure not to exceed the RGAWR
ball closest to the vehicle. This will the GVWR (Gross Vehicle Weight before applying the weight
help reduce the effect of trailer Rating) or the RGAWR (Rear Gross distribution spring bars.
tongue weight on the rear axle. Axle Weight Rating). See “Total
Weight on the Vehicle's Tires” later
in this section for more information.
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GMC Sierra Owner Manual - 2011 Black plate (112,1)

9-112 Driving and Operating

Weight of the Trailering Larger trailers may require a Weight‐Distributing Hitch

Combination weight-distributing hitch that Adjustment
uses spring bars to distribute
It is important that the combination the trailer tongue weight among
of the tow vehicle and trailer the two vehicle and trailer axles.
does not exceed any of its weight Fifth-wheel and gooseneck hitches
ratings — GCWR, GVWR, RGAWR, may also be used. See “Weight of
Trailer Weight Rating, or Tongue the Trailer Tongue” under Trailer
Weight. The only way to be sure it is Towing on page 9‑95 for rating
not exceeding any of these ratings limits with various hitch types.
is to weigh the tow vehicle and
trailer combination, fully loaded for If a step-bumper hitch will be used,
the trip, getting individual weights the bumper could be damaged
for each of these items. in sharp turns. Make sure there
is ample room when turning to
Towing Equipment avoid contact between the trailer
and the bumper. A. Body to Ground Distance
Hitches Consider using sway controls B. Front of Vehicle
The correct hitch equipment helps with any trailer. Ask a trailering
When using a weight-distributing
maintain combination control. professional about sway controls
hitch, the spring bars should be
Most small-to-medium trailers can or refer to the trailer manufacturer's
adjusted so the distance (A) is the
be towed with a weight-carrying recommendations and instructions.
same after coupling the trailer to the
hitch which simply features a tow vehicle and adjusting the hitch.
coupler latched to the hitch ball.

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GMC Sierra Owner Manual - 2011 Black plate (113,1)

Driving and Operating 9-113

Fifth-Wheel and Gooseneck The hitch should be located in the Safety Chains
Trailering pickup bed so that its centerline is
Always attach chains between the
over or slightly in front of the rear
Fifth-wheel and gooseneck trailers vehicle and the trailer. Cross the
axle. Take care that it is not so far
can be used with many pickup safety chains under the tongue
forward that it will contact the back
models. These trailers place a of the trailer to help prevent the
of the cab in sharp turns. This is
larger percentage of the weight tongue from contacting the road
especially important for short box
(kingpin weight) on the tow vehicle if it becomes separated from the
pickups. Trailer pin box extensions
than conventional trailers. Make hitch. Instructions about safety
and sliding fifth-wheel hitch
sure this weight does not cause the chains may be provided by the
assemblies can help this condition.
vehicle to exceed GAWR or GVWR. hitch manufacturer or by the trailer
There should be at least six inches
manufacturer. If the trailer being
Fifth-wheel or gooseneck kingpin of clearance between the top of the
towed weighs up to 2 271 kg
weight should be 15 to 25 percent of pickup box and the bottom of the
(5,000 lbs) with a factory-installed
the trailer weight up to the maximum trailer shelf that extends over
step bumper, safety chains may
amount specified in the trailering the box.
be attached to the attaching points
chart for the vehicle. See “Weight of Make sure the hitch is attached to on the bumper; otherwise, safety
the Trailer” under Trailer Towing on the tow vehicle frame rails. Do not chains should be attached to holes
page 9‑95 for more information. use the pickup box for support. on the trailer hitch platform. Always
leave just enough slack so the
combination can turn. Never allow
safety chains to drag on the ground.

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GMC Sierra Owner Manual - 2011 Black plate (114,1)

9-114 Driving and Operating

Trailer Brakes If everything checks out this far, Trailer Wiring Harness
make the brake tap at the port on
A loaded trailer that weighs more The vehicle is equipped with one of
the master cylinder that sends the
than 900 kg (2,000 lbs) needs to the following wiring harnesses for
fluid to the rear brakes. Use only
have its own brake system that towing a trailer or hauling a slide-in
steel brake tubing to make the tap.
is adequate for the weight of the camper.
trailer. Be sure to read and follow Auxiliary Battery
the instructions for the trailer brakes Basic Trailer Wiring
so they are installed, adjusted, and The auxiliary battery provision can All regular, extended cab and crew
maintained properly. be used to supply electrical power cab pickups have a seven‐wire
to additional equipment that may be trailer towing harness.
If the vehicle is equipped with added, such as a slide-in camper.
StabiliTrak, the trailer cannot tap If the vehicle has this provision, For vehicles not equipped with
into the vehicle's hydraulic brake this relay will be located on the heavy duty trailering, the harness
system. driver side of the vehicle, next to is secured to the vehicle's frame
The trailer brake system can tap the underhood electrical center. behind the spare tire mount.
into the vehicle's hydraulic brake The harness requires the installation
Be sure to follow the proper of a trailer connector, which is
system only if: installation instructions included available through your dealer.
. The trailer parts can withstand with any electrical equipment that
20 650 kPa (3,000 psi) of is installed. If towing a light‐duty trailer with
pressure. a standard four‐way round pin
Notice: Leaving electrical connector, an adapter is available
. The trailer's brake system equipment on for extended from your dealer.
will use less than 0.3 cc periods will drain the battery.
(0.02 cubic inch) of fluid from Always turn off electrical
the vehicle's master cylinder. equipment when not in use
Otherwise, both braking systems and do not use equipment that
will not work well or at all. exceeds the maximum amperage
rating for the auxiliary battery
provision.
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GMC Sierra Owner Manual - 2011 Black plate (115,1)

Driving and Operating 9-115

Heavy-DutyTrailer Wiring Harness

. Brown: Taillamps If charging a remote (non-vehicle)
Package . White: Ground battery, press the Tow/Haul Mode
.
button, if equipped, located at
Light Green: Back-up Lamps the end of the shift lever. This will
. Red: Battery Feed* boost the vehicle system voltage
and properly charge the battery.
. Dark Blue: Trailer Brake*
If the trailer is too light for Tow/
*The fuses for these two circuits Haul Mode, or the vehicle is not
are installed in the underhood equipped with Tow/Haul, turn on
electrical center, but the wires are the headlamps as a second way
not connected. They should be to boost the vehicle system and
connected by your dealer or a charge the battery.
qualified service center. The fuse
and wire for the ITBC is factory
installed and connected if the
For vehicles equipped with heavy vehicle is equipped with an ITBC.
duty trailering, the harness is The fuse for the battery feed is
connected to a bracket on the hitch not required if the vehicle has an
platform. The seven-wire harness auxiliary battery. If the vehicle does
contains the following trailer circuits: not have an auxiliary battery, have
your dealer or authorized service
. Yellow: Left Stop/Turn Signal center install the required fuse.
. Dark Green: Right Stop/Turn
Signal

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GMC Sierra Owner Manual - 2011 Black plate (116,1)

9-116 Driving and Operating

Camper/Fifth-Wheel Trailer Wiring Electric Brake Control Wiring

Package Provisions
The seven-wire camper harness These wiring provisions are
is located under the front edge of included with the vehicle as part
the pickup box on the driver side of the trailer wiring package. These
of the vehicle, attached to the provisions are for an electric brake
frame bracket. A connector must controller. The instrument panel
be added to the wiring harness contains blunt cut wires behind the
which connects to the camper. steering column for the trailer brake
The harness contains the following controller. The harness contains the
camper/trailer circuits: following wires:
. Yellow: Left Stop/Turn Signal . Dark Blue: Brake Signal to
If the vehicle is equipped with the
Trailer Connector
. Dark Green: Right Stop/Turn “Heavy-Duty Trailering” option,
Signal please refer to “Heavy-Duty Trailer . Red/Black: Battery
Wiring Package” earlier in this . Light Blue/White: Brake Switch
. Brown: Taillamps
section.
. White: Ground . White: Ground
When the camper-wiring harness
. Light Green: Back-up Lamps is ordered without the heavy-duty The harness should be installed by
trailering package, an eight-wire your dealer or a qualified service
. Red: Battery Feed center.
harness with a seven-pin connector
. Dark Blue: Trailer Brake is located at the rear of the vehicle
and is tied to the vehicle's frame.

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GMC Sierra Owner Manual - 2011 Black plate (117,1)

Driving and Operating 9-117

If the vehicle is equipped with an

. When pulling a heavy trailer
Integrated Trailer Brake Control or a large or heavy load in
(ITBC) System, the blunt cuts stop-and-go traffic.
exist, but are not connected further . When pulling a heavy trailer
in the harness. If an aftermarket or a large or heavy load in busy
trailer brake controller is installed, parking lots where improved low
the ITBC must be disconnected. This indicator light on the instrument speed control of the vehicle is
Do not power both ITBC and panel cluster comes on when the desired.
aftermarket controllers to control Tow/Haul Mode is on.
the trailer brakes at the same time. Operating the vehicle in Tow/Haul
Tow/Haul is a feature that assists when lightly loaded or with no
Tow/Haul Mode when pulling a heavy trailer or a trailer at all will not cause damage.
large or heavy load. See Tow/Haul However, there is no benefit to
Mode on page 9‑51 for more the selection of Tow/Haul when
information. the vehicle is unloaded. Such a
selection when unloaded may
Tow/Haul is designed to be most result in unpleasant engine and
effective when the vehicle and transmission driving characteristics
trailer combined weight is at least and reduced fuel economy. Tow/
75 percent of the vehicle's Gross Haul is recommended only when
Combined Weight Rating (GCWR). pulling a heavy trailer or a large
See “Weight of the Trailer” under or heavy load.
Trailer Towing on page 9‑95.
Tow/Haul is most useful under
the following driving conditions:
. When pulling a heavy trailer or
Pressing this button at the end of a large or heavy load through
the shift lever turns on and off the rolling terrain.
Tow/Haul Mode.
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GMC Sierra Owner Manual - 2011 Black plate (118,1)

9-118 Driving and Operating

Integrated Trailer Brake cause the vehicle’s antilock brake The ITBC system is fully functional
Control System or StabiliTrak systems to activate, only when the ignition is in ON or
power sent to the trailer's brakes in RUN.
will be automatically adjusted to The ITBC system can only be used
minimize trailer wheel lock-up. with trailers with electric brakes.
This does not imply that the trailer
has StabiliTrak.
2500 and 3500 series vehicles
{ WARNING
with StabiliTrak have a Trailer Sway Connecting a trailer that is not
The vehicle may have an Integrated Control (TSC) feature. See Trailer compatible with the ITBC system
Trailer Brake Control (ITBC) system Sway Control (TSC) on page 9‑124. may result in reduced or complete
for electric trailer brakes. loss of trailer braking. There
2500 and 3500 series vehicles
This symbol is located on the with StabiliTrak have a Hill Start may be an increase in stopping
Trailer Brake Control Panel on Assist (HSA) feature. See Hill Start distance or trailer instability which
vehicles with an Integrated Trailer Assist (HSA) on page 9‑70. could result in personal injury or
Brake Control system. The power damage to the vehicle, trailer,
output to the trailer brakes is based If the vehicle’s brake, antilock
brake, or StabiliTrak systems are or other property. An aftermarket
on the amount of brake pressure controller may be available for
being applied by the vehicle’s brake not functioning properly, the ITBC
system may not be fully functional use with trailers with surge, air,
system. This available power output or electric‐over‐hydraulic trailer
to the trailer brakes can be adjusted or may not function at all. Make
sure all of these systems are brake systems. To determine the
to a wide range of trailering
fully operational to ensure full type of brakes on the trailer and
situations.
functionality of the ITBC system. the availability of controllers,
The ITBC system is integrated check with your trailer
with the vehicle’s brake, antilock The ITBC system is powered
through the vehicle's electrical manufacturer or dealer.
brake, and StabiliTrak (if equipped)
systems. In trailering conditions that system. Turning the ignition off
will also
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GMC Sierra Owner Manual - 2011 Black plate (119,1)

Driving and Operating 9-119

When trailering, make sure of the Trailer Brake Control Panel information. The control panel
following: allows adjustment to the amount
. The ITBC system is used only of output, referred to as trailer
with trailers that are equipped gain, available to the electric
with electric brakes. trailer brakes and allows manual
application of the trailer brakes.
. All applicable local and federal The Trailer Brake Control Panel is
laws and regulations are used along with the Trailer Brake
followed. Display Page on the DIC to adjust
. All electrical and mechanical and display power output to the
connections to the trailer are trailer brakes.
made correctly. Trailer Brake DIC Display Page
. The trailer’s brakes are in proper The ITBC system displays
working condition. messages on the vehicle’s
. The trailer and vehicle are A. Manual Trailer Brake Apply Driver Information Center (DIC).
properly loaded for the towing Lever See Driver Information Center (DIC)
condition. on page 5‑33 for more information.
B. Trailer Gain Adjustment Buttons
The ITBC system is a The display page indicates Trailer
The ITBC system has a control
factory-installed item. Out‐of‐factory Gain setting, power output to
panel located on the instrument
installation of this system should not the electric trailer brakes, trailer
panel to the left of the steering
be attempted. GM is not responsible connection, and system operational
column. See Instrument Panel
for warranty or performance of the status.
(Base/Uplevel Version) on page 1‑2
system resulting from out‐of‐factory or Instrument Panel (Premium
installation. Version) on page 1‑6 for more

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GMC Sierra Owner Manual - 2011 Black plate (120,1)

9-120 Driving and Operating

The Trailer Brake Display Page can All DIC warning and service 0.0 (zero) gain is the factory default
be displayed by performing any of messages must first be setting. To properly adjust trailer
the following actions: acknowledged by the driver gain, see “Trailer Gain Adjustment
. Scrolling through the DIC menu by pressing the odometer trip stem Procedure” later in this section.
pages using the odometer or the DIC Vehicle Information TRAILER OUTPUT: This is
trip stem or the DIC Vehicle button (if equipped) before the displayed any time a trailer with
Information button (if equipped). Trailer Brake Display Page can electric brakes is connected.
be displayed and Trailer Gain Output to the electric brakes is
. Pressing a Trailer Gain can be adjusted.
button—If the Trailer Brake based on the amount of vehicle
Display Page is not currently TRAILER GAIN: This setting is braking present and relative to
displayed, pressing a Trailer displayed any time the Trailer Brake the Trailer Gain setting. Output
Gain button will first recall the Display Page is active. This setting is displayed from 0 to 10 bars for
current Trailer Gain setting. can be adjusted from 0.0 to 10.0 each gain setting.
After the Trailer Brake Display with either a trailer connected or On vehicles with Trailer Sway
Page is displayed, each press disconnected. To adjust the Trailer Control (TSC) or Hill Start Assist
and release of the gain buttons Gain, press one of the Trailer Gain (HSA), output to the electric trailer
will then cause the Trailer Gain adjustment buttons located on the brakes may be displayed when the
setting to change. Trailer Brake Control Panel. Press systems are active. See Trailer
and hold a gain button to cause the Sway Control (TSC) on page 9‑124
. Activating the Manual Trailer Trailer Gain to continuously adjust.
Brake Apply lever. and Hill Start Assist (HSA) on
To turn the output to the trailer off, page 9‑70.
. Connecting a trailer equipped adjust the Trailer Gain setting to
with electric trailer brakes. 0.0 (zero).

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GMC Sierra Owner Manual - 2011 Black plate (121,1)

Driving and Operating 9-121

The Trailer Output will indicate Manual Trailer Brake Apply Trailer Gain Adjustment Procedure
“- - - - - -” on the Trailer Brake The Manual Trailer Brake Apply Trailer Gain should be set for a
Display Page whenever the Lever is located on the Trailer specific trailering condition and
following occur: Brake Control Panel and is used must be adjusted any time vehicle
. No trailer is connected to apply the trailer’s electric brakes loading, trailer loading, or road
. A trailer without electric brakes independent of the vehicle’s brakes. surface conditions change.
is connected (no DIC message This lever is used in the Trailer Gain Setting the Trailer Gain properly
is displayed) Adjustment Procedure to properly is needed for the best trailer
adjust the power output to the trailer stopping performance. A trailer
. A trailer with electric brakes brakes. Sliding the lever to the left
has become disconnected that is over-gained may result in
will apply only the trailer brakes. locked trailer brakes. A trailer that
(a CHECK TRAILER WIRING The power output to the trailer is
message will also be displayed is under-gained may result in not
indicated in the Trailer Brake enough trailer braking. Both of
on the DIC) Display Page on the DIC. If the these conditions may result in
. There is a fault present in the vehicle’s service brakes are applied poorer stopping and stability of
wiring to the electric trailer while using the Manual Trailer Brake the vehicle and trailer.
brakes (a CHECK TRAILER Apply Lever, the trailer output power
WIRING message will also be will be the greater of the two.
displayed on the DIC) The trailer's and the vehicle's brake
. There is a fault in the ITBC lamps will come on when either
system (a SERVICE TRAILER vehicle braking or manual trailer
BRAKE SYSTEM message will brakes are applied.
also be displayed in the DIC)

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9-122 Driving and Operating

Use the following procedure to

. In the Trailer Output display 6. Adjust the Trailer Gain to just
correctly adjust Trailer Gain for on the DIC, “- - - - - -” will below the point of trailer wheel
each towing condition: disappear if there is no lock-up, indicated by trailer
error present. Connecting wheel squeal or tire smoke
1. Make sure the trailer brakes are a trailer without electric
in proper working condition. when a trailer wheel locks.
brakes will not clear the
2. Connect a properly loaded six dashed lines. Trailer wheel lock-up may not
trailer to the vehicle and make occur if towing a heavily loaded
4. Adjust the Trailer Gain by using trailer. In this case, adjust the
all necessary mechanical the gain adjustment (+ / -)
and electrical connections. Trailer Gain to the highest
buttons on the Trailer Brake allowable setting for the towing
See Vehicle Load Limits on Control Panel.
page 9‑25 for more information. condition.
5. Drive the vehicle with the 7. Re-adjust Trailer Gain any time
3. After the electrical connection is trailer attached on a level road
made to a trailer equipped with vehicle loading, trailer loading or
surface representative of the road surface conditions change
electric brakes: towing condition and free of or if trailer wheel lock-up is
. A TRAILER CONNECTED traffic at about 32 to 40 km/h noticed at any time while towing.
message will be briefly (20 to 25 mph) and fully apply
displayed on the DIC. the Manual Trailer Brake Apply
Lever.
. The Trailer Brake Display
Page will appear on the Adjusting trailer gain at speeds
DIC showing TRAILER lower than 32 to 40 km/h
GAIN and TRAILER (20 to 25 mph) may result
OUTPUT. in an incorrect gain setting.

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GMC Sierra Owner Manual - 2011 Black plate (123,1)

Driving and Operating 9-123

Other ITBC-Related DIC Messages If the disconnect occurs while To determine if the electrical
In addition to displaying TRAILER the vehicle is stationary, this fault is on the vehicle side or trailer
GAIN and TRAILER OUTPUT message will automatically side of the trailer wiring harness
through the DIC, trailer connection turn off in about 30 seconds. connection, do the following:
and ITBC system status are This message will also turn off 1. Disconnect the trailer wiring
displayed on the DIC. if the driver acknowledges this harness from the vehicle.
message or if the trailer harness
TRAILER CONNECTED: This is re-connected. 2. Turn the ignition off.
message will be briefly displayed 3. Wait 10 seconds, then turn the
when a trailer with electric brakes If the disconnect occurs
while the vehicle is moving, ignition back to RUN.
is first connected to the vehicle.
This message will automatically turn this message will continue 4. If the CHECK TRAILER WIRING
off in about 10 seconds. The driver until the ignition is turned off. message re-appears, the
can also acknowledge this message This message will also turn off electrical fault is on the
before it automatically turns off. if the driver acknowledges this vehicle side.
message or if the trailer harness
CHECK TRAILER WIRING: This is re-connected. If the CHECK TRAILER WIRING
message will be displayed if: message only re-appears when
2. There is an electrical fault in connecting the trailer wiring
1. The ITBC system first the wiring to the electric trailer harness to the vehicle, the
determines connection to a brakes. This message will electrical fault is on the
trailer with electric brakes and continue as long as there is trailer side.
then the trailer harness becomes an electrical fault in the trailer
disconnected from the vehicle. wiring. This message will
also turn off if the driver
acknowledges this message.

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GMC Sierra Owner Manual - 2011 Black plate (124,1)

9-124 Driving and Operating

SERVICE TRAILER BRAKE An authorized GM dealer may without the driver pressing the brake
SYSTEM: This message will be be able to diagnose and repair pedal. If the vehicle is equipped with
displayed when there is a problem problems with the trailer. However, the Integrated Trailer Brake Control
with the ITBC system. If this any diagnosis and repair of the (ITBC) system, StabiliTrak may also
message persists over multiple trailer is not covered under the apply the trailer brakes. The TCS/
ignition cycles, there is a problem vehicle warranty. Please contact StabiliTrak warning light will flash on
with the ITBC system. Take the your trailer dealer for assistance the instrument panel cluster to notify
vehicle to an authorized GM dealer with trailer repairs and trailer the driver to reduce speed. If the
to have the ITBC system diagnosed warranty information. trailer continues to sway, StabiliTrak
and repaired. will reduce engine torque to help
If either the CHECK TRAILER Trailer Sway slow the vehicle.
WIRING or SERVICE TRAILER Control (TSC) Adding non‐dealer accessories can
BRAKE SYSTEM message is affect the vehicle's performance.
displayed while driving the vehicle, Trailer Sway Control (TSC) See Accessories and Modifications
power is no longer available 2500 and 3500 series vehicles with on page 10‑3 for more information.
to the trailer brakes. When traffic StabiliTrak have a Trailer Sway
conditions allow, carefully pull the Control (TSC) feature. If the vehicle
vehicle over to the side of the road is towing a trailer and the system
and turn the ignition off. Check the detects that the trailer is swaying,
wiring connection to the trailer and the vehicle's brakes are applied
turn the ignition back on. If either of
these messages continues, either
the vehicle or trailer needs service.

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GMC Sierra Owner Manual - 2011 Black plate (125,1)

Driving and Operating 9-125

Conversions and Adding a Snow Plow or Some vehicles are built with a
special snow plow prep package,
Add-Ons Similar Equipment called RPO VYU. If your vehicle
Before installing a snow plow on the has this option, you can add a
Add-On Electrical vehicle, here are some things you plow to it, provided certain weights,
need to know: such as the weights on the vehicle's
Equipment axles and the Gross Vehicle
Notice: If your vehicle does
Notice: Do not add anything Weight (GVW), are not exceeded.
not have the snow plow prep
electrical to the vehicle unless The plow the vehicle can carry
package, adding a plow can
you check with your dealer first. depends on many things, such as:
damage your vehicle, and the
Some electrical equipment can
repairs would not be covered by . The options the vehicle came
damage the vehicle and the
warranty. Unless your vehicle was with, and the weight of those
damage would not be covered
built to carry a snow plow, do not options.
by the vehicle's warranty. Some
add one to your vehicle. If your
add-on electrical equipment can . The weight and number of
vehicle has the snow plow prep
keep other components from passengers you intend to carry.
package, called RPO VYU, then
working as they should.
the payload your vehicle can . The weight of items added to
Add-on equipment can drain the carry will be reduced when a the vehicle, like a tool box or
vehicle battery, even if the vehicle snow plow is installed. Your truck cap.
is not operating. vehicle can be damaged if either
the front or rear axle ratings or
. The total weight of any
The vehicle has an airbag system. additional cargo you intend
Before attempting to add anything the Gross Vehicle Weight (GVW)
are exceeded. to carry.
electrical to the vehicle, see
Servicing the Airbag-Equipped
Vehicle on page 3‑46 and Adding
Equipment to the Airbag-Equipped
Vehicle on page 3‑46.
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9-126 Driving and Operating

Say, for example, you have a 318 kg

. Follow the snow fuel and passengers. Basically,
(700 lb) snow plow. The total weight plow manufacturer's it is the amount of weight that can
of all occupants and cargo inside recommendations regarding be added to the front axle before
the cab should not exceed 135 kg rear ballast. Rear ballast may reaching the front GAWR.
(300 lb). This means that you may be required to ensure a proper
front and rear weight distribution The front axle reserve capacity
only be able to carry one passenger. for the vehicle can be found
But, even this may be too much ratio, even though the actual
weight at the front axle may be in the lower right corner of the
if you have got other equipment Certification/Tire label, as shown.
already adding to the weight of less than the front axle rating.
the vehicle. . The snow plow manufacturer
Here are some guidelines for safely or installer can assist you in
carrying a snow plow on the vehicle: determining the amount of rear
ballast required, to help make
. Make sure the weight on the sure the snowplow/vehicle
front and rear axles does not combination does not exceed
exceed the axle rating for each. the GVW rating, the front and
. For the front axle, if more cargo rear axle ratings, and the front
or passengers must be carried, and rear weight distribution ratio.
appropriate counter ballast must . The total vehicle must not
be installed rear of the rear axle. exceed the GVW rating.
Counter ballast must be properly
secured so it will not move Front axle reserve capacity is the United States
during driving. difference between the Gross Axle
Weight Rating (GAWR) and the front
axle weight of the vehicle with full

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Driving and Operating 9-127

For example, adding a 318 kg

(700 lb) snow plow actually adds
more than 318 kg (700 lbs) to the
front axle. Using the formula, if the
snow plow is 122 cm (4 ft) in front of
the front axle and the wheel base is
305 cm (10 ft), then:
W = 318 kg (700 lb)
A = 122 cm (4 ft)
W.B. = 305 cm (10 ft)
(W x (A + W.B.))/W.B. =
(700 x (4 + 10))/10 = 445 kg (980 lbs)
Canada (W x (A + W.B.)) /W.B.= Weight So, if the front axle reserve capacity
In order to calculate the amount of the accessory is adding to the is more than 445 kg (980 lbs), you
weight any front accessory, such as front axle. could add the snow plow without
a snow plow, is adding to the front Where: exceeding the front GAWR.
axle, use the following formula: W = Weight of added accessory You can add heavier equipment
A = Distance that the accessory on the front of the vehicle if you
is in front of the front axle compensate for it by carrying fewer
W.B. = Vehicle Wheelbase passengers, less cargo, or by
positioning cargo toward the rear.

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GMC Sierra Owner Manual - 2011 Black plate (128,1)

9-128 Driving and Operating

This has the effect of reducing the Total vehicle reserve capacity is the
load on the front. However, the front WARNING (Continued) difference between the GVWR and
GAWR, rear GAWR, and the Gross the weight of the truck with full fuel
Vehicle Weight Rating (GVWR) must always follow the snow plow and passengers. It is the amount of
never be exceeded. manufacturer or installer's weight that can be added to the
recommendation for rear ballast vehicle before reaching the GVWR.
{ WARNING to ensure a proper front and rear
weight distribution ratio, even
Keep in mind that reserve capacity
numbers are intended as a guide
On some vehicles that have though the actual front weight when selecting the amount of
certain front mounted equipment, may be less than the front equipment or cargo the truck can
such as a snow plow, it may be GAWR, and the total vehicle carry. If unsure of the vehicle's front,
possible to load the front axle to weight is less than the gross rear, or total weight, go to a weigh
the front gross axle weight rating vehicle weight rating (GVWR). station and weigh the vehicle.
(GAWR) but not have enough Maintaining a proper front and Your dealer can also help with this.
weight on the rear axle to have rear weight distribution ratio is The total vehicle reserve capacity
proper braking performance. necessary to provide proper for the vehicle can be found
If your brakes can not work braking performance. in the lower right corner of the
properly, you could have a crash. Certification/Tire label as shown
To help your brakes work properly previously.
when a snow plow is installed, See your dealer for additional
(Continued) advice and information about
using a snow plow on the vehicle.
Also, see Vehicle Load Limits on
page 9‑25.

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Driving and Operating 9-129

Emergency Roof Lamp

Provisions
Vehicles with the RPO VYU snow
plow prep package also have an
emergency roof lamp provision
package, RPO TRW. Wiring for the
emergency roof lamp is provided
above the overhead console. See
Auxiliary Roof-Mounted Lamp on
page 6‑7 for switch location.

Pickup Conversion to
Chassis Cab
We are aware that some vehicle
owners might consider having
the pickup box removed and a
commercial or recreational body
installed. Owners should be aware
that, as manufactured, there are
differences between a chassis cab
and a pickup with the box removed
which could affect vehicle safety.
The components necessary to adapt
a pickup to permit its safe use with
a specialized body should be
installed by the body builder.
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9-130 Driving and Operating

2 NOTES

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GMC Sierra Owner Manual - 2011 Black plate (1,1)

Vehicle Care 10-1

Engine Overheating . . . . . . . . 10-25

Vehicle Care Overheated Engine
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-44
Protection Halogen Bulbs . . . . . . . . . . . . . . 10-44
Operating Mode . . . . . . . . . . . 10-28 Headlamps . . . . . . . . . . . . . . . . . 10-44
General Information Engine Fan . . . . . . . . . . . . . . . . . 10-28 Pick-Up Box Identification
General Information . . . . . . . . . . 10-2 Power Steering Fluid . . . . . . . 10-29 and Fender Marker
California Proposition Washer Fluid . . . . . . . . . . . . . . . 10-29 Lamps . . . . . . . . . . . . . . . . . . . . 10-45
65 Warning . . . . . . . . . . . . . . . . . 10-3 Brakes . . . . . . . . . . . . . . . . . . . . . 10-30 Taillamps (Chassis Cab
California Perchlorate Brake Fluid . . . . . . . . . . . . . . . . . 10-32 Models) . . . . . . . . . . . . . . . . . . . 10-46
Materials Requirements . . . . 10-3 Battery . . . . . . . . . . . . . . . . . . . . . 10-34 Taillamps, Turn Signal,
Accessories and Four-Wheel Drive . . . . . . . . . . . 10-34 Stoplamps, and Back-Up
Modifications . . . . . . . . . . . . . . . 10-3 Front Axle . . . . . . . . . . . . . . . . . . 10-36 Lamps . . . . . . . . . . . . . . . . . . . . 10-46
Vehicle Checks Rear Axle . . . . . . . . . . . . . . . . . . 10-37 Center High-Mounted
Doing Your Own Noise Control System . . . . . . 10-38 Stoplamp (CHMSL) and
Service Work . . . . . . . . . . . . . . . 10-4 Starter Switch Check . . . . . . . 10-39 Cargo Lamp . . . . . . . . . . . . . . 10-47
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-5 Automatic Transmission Shift License Plate Lamp . . . . . . . . 10-48
Engine Compartment Lock Control Function Replacement Bulbs . . . . . . . . . 10-48
Overview . . . . . . . . . . . . . . . . . . . 10-6 Check . . . . . . . . . . . . . . . . . . . . . 10-40
Engine Oil . . . . . . . . . . . . . . . . . . . 10-7 Ignition Transmission Lock Electrical System
Check . . . . . . . . . . . . . . . . . . . . . 10-40 Electrical System
Engine Oil Life System . . . . . 10-11
Park Brake and P (Park) Overload . . . . . . . . . . . . . . . . . . 10-49
Automatic Transmission
Mechanism Check . . . . . . . . 10-40 Fuses and Circuit
Fluid (4-Speed
Wiper Blade Breakers . . . . . . . . . . . . . . . . . . 10-50
Transmission) . . . . . . . . . . . . . 10-13
Replacement . . . . . . . . . . . . . . 10-41 Engine Compartment Fuse
Automatic Transmission
Glass Replacement . . . . . . . . 10-41 Block . . . . . . . . . . . . . . . . . . . . . 10-50
Fluid (6-Speed
Instrument Panel Fuse
Transmission) . . . . . . . . . . . . . 10-16 Headlamp Aiming Block . . . . . . . . . . . . . . . . . . . . . 10-54
Engine Air Cleaner/Filter . . . . 10-19 Headlamp Aiming . . . . . . . . . . 10-42
Cooling System . . . . . . . . . . . . 10-20
Engine Coolant . . . . . . . . . . . . . 10-22 I
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GMC Sierra Owner Manual - 2011 Black plate (2,1)

10-2 Vehicle Care

Wheels and Tires Uniform Tire Quality General Information

Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-57 Grading . . . . . . . . . . . . . . . . . . . 10-80
Tire Sidewall Labeling . . . . . . 10-58 Wheel Alignment and Tire For service and parts needs,
Tire Designations . . . . . . . . . . . 10-61 Balance . . . . . . . . . . . . . . . . . . . 10-81 visit your dealer. You will receive
Tire Terminology and Wheel Replacement . . . . . . . . 10-82 genuine GM parts and GM-trained
Definitions . . . . . . . . . . . . . . . . 10-62 Tire Chains . . . . . . . . . . . . . . . . . 10-83 and supported service people.
Tire Pressure . . . . . . . . . . . . . . . 10-66 If a Tire Goes Flat . . . . . . . . . . 10-84 Genuine GM parts have one of
Tire Pressure for High-Speed Tire Changing . . . . . . . . . . . . . . 10-86 these marks:
Operation . . . . . . . . . . . . . . . . . 10-67 Full-Size Spare Tire . . . . . . . . 10-97
Tire Pressure Monitor
System . . . . . . . . . . . . . . . . . . . 10-68 Jump Starting
Tire Pressure Monitor Jump Starting . . . . . . . . . . . . . . 10-98
Operation . . . . . . . . . . . . . . . . . 10-69 Towing
Tire Inspection . . . . . . . . . . . . . . 10-73 Towing the Vehicle . . . . . . . . 10-103
Tire Rotation . . . . . . . . . . . . . . . 10-73 Recreational Vehicle
Dual Tire Rotation . . . . . . . . . . 10-75 Towing . . . . . . . . . . . . . . . . . . . 10-103
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . 10-76 Appearance Care
Buying New Tires . . . . . . . . . . . 10-77 Exterior Care . . . . . . . . . . . . . . 10-108
Different Size Tires and Interior Care . . . . . . . . . . . . . . . 10-112
Wheels . . . . . . . . . . . . . . . . . . . 10-79 Floor Mats . . . . . . . . . . . . . . . . . 10-116

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GMC Sierra Owner Manual - 2011 Black plate (3,1)

Vehicle Care 10-3

California Proposition Accessories and covered under the terms of the

vehicle warranty and may affect
65 Warning Modifications remaining warranty coverage for
Most motor vehicles, including this Adding non‐dealer accessories affected parts.
one, contain and/or emit chemicals to the vehicle can affect vehicle GM Accessories are designed to
known to the State of California to performance and safety, including complement and function with other
cause cancer and birth defects or such things as airbags, braking, systems on the vehicle. Your GM
other reproductive harm. Engine stability, ride and handling, dealer can accessorize the vehicle
exhaust, many parts and systems, emissions systems, aerodynamics, using genuine GM Accessories.
many fluids, and some component durability, and electronic systems When you go to your GM dealer
wear by-products contain and/or like antilock brakes, traction control, and ask for GM Accessories,
emit these chemicals. and stability control. Some of these you will know that GM-trained and
accessories could even cause supported service technicians will
California Perchlorate malfunction or damage not covered perform the work using genuine
by the vehicle warranty.
Materials Requirements GM Accessories.
Damage to vehicle components Also, see Adding Equipment to
Certain types of automotive
resulting from the installation or use the Airbag-Equipped Vehicle on
applications, such as airbag
of non‐GM certified parts, including page 3‑46.
initiators, seat belt pretensioners,
control module modifications, is not
and lithium batteries contained in
Remote Keyless Entry transmitters,
may contain perchlorate materials.
Special handling may be necessary.
For additional information, see
www.dtsc.ca.gov/hazardouswaste/
perchlorate.

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GMC Sierra Owner Manual - 2011 Black plate (4,1)

10-4 Vehicle Care

Vehicle Checks WARNING (Continued)

This vehicle has an airbag system.
Before attempting to do your own
service work, see Airbag System
Doing Your Own . Be sure to use the proper Check on page 3‑48.
Service Work nuts, bolts, and other
fasteners. Metric and Keep a record with all parts receipts
If the vehicle is a hybrid, see English fasteners can be and list the mileage and the date
the hybrid supplement for more easily confused. If the wrong of any service work performed.
information. See Maintenance Records on
fasteners are used, parts
page 11‑12.
can later break or fall off.
{ WARNING You could be hurt.
You can be injured and the
vehicle could be damaged if you If doing some of your own service
try to do service work on a vehicle work, use the proper service
without knowing enough about it. manual. It tells you much more
.
about how to service the vehicle
Be sure you have sufficient than this manual can. To order the
knowledge, experience, proper service manual, see Service
the proper replacement Publications Ordering Information
parts, and tools before on page 13‑15.
attempting any vehicle
maintenance task.
(Continued)

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GMC Sierra Owner Manual - 2011 Black plate (5,1)

Vehicle Care 10-5

Hood 3. Push the secondary hood

release to the right.
To open the hood:
4. Lift the hood.
Before closing the hood, be sure
all the filler caps are on properly.
Then bring the hood from full
open to within 152 mm (6 in)
from the closed position, pause,
and push the front center of the
1. Pull the handle with this symbol hood with a swift, firm motion to
on it. It is located inside the fully close the hood.
vehicle to the left of the brake
pedal. 2. Go to the front of the vehicle
and locate the secondary hood
release. This is located under
the hood, near the center of
the grille.

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GMC Sierra Owner Manual - 2011 Black plate (6,1)

10-6 Vehicle Care

Engine Compartment Overview

5.3 L V8 Engine Shown (4.3 L V6 Engine, 4.8 L V6 Engine, 6.0 L V8 Engine, and 6.2 L V8 Engine Similar)

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GMC Sierra Owner Manual - 2011 Black plate (7,1)

Vehicle Care 10-7

A. Engine Air Cleaner/Filter on H. Engine Oil Dipstick (Out of Engine Oil

page 10‑19. View). See “Checking Engine
Oil” under Engine Oil on For diesel engine vehicles, see
B. Coolant Surge Tank and “Engine Oil” in the Duramax Diesel
Pressure Cap. See Cooling page 10‑7.
Supplement.
System on page 10‑20. I. Engine Cooling Fan (Out of
View). See Cooling System on To ensure proper engine
C. Positive (+) Terminal. See Jump performance and long life, careful
Starting on page 10‑98. page 10‑20.
attention must be paid to engine
D. Battery on page 10‑34. J. Power Steering Fluid Reservoir. oil. Following these simple, but
See Power Steering Fluid on important steps will help protect
E. Remote Negative (−) Terminal page 10‑29. your investment:
(Out of View). See Jump
Starting on page 10‑98. K. Brake Master Cylinder . Always use engine oil approved
Reservoir. See Brake Fluid on to the proper specification and
F. Automatic Transmission page 10‑32. of the proper viscosity grade.
Dipstick (Out of View).
L. Engine Compartment Fuse See “Selecting the Right Engine
See “Checking the Fluid Level” Oil” in this section.
under Automatic Transmission Block on page 10‑50.
Fluid (4-Speed Transmission) M. Windshield Washer Fluid . Check the engine oil level
on page 10‑13 or Automatic Reservoir. See “Adding Washer regularly and maintain the
Transmission Fluid (6-Speed Fluid” under Washer Fluid on proper oil level. See “Checking
Transmission) on page 10‑16. page 10‑29. Engine Oil” and “When to Add
Engine Oil” in this section.
G. Engine Oil Fill Cap. See “When If the vehicle has a diesel engine
to Add Engine Oil” under and/or an Allison Transmission, see . Change the engine oil at the
Engine Oil on page 10‑7. the Duramax Diesel Supplement. appropriate time. See Engine
Oil Life System on page 10‑11.
. Always dispose of engine oil
properly. See “What to Do with
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Used Oil” in this section.
GMC Sierra Owner Manual - 2011 Black plate (8,1)

10-8 Vehicle Care

Checking Engine Oil When to Add Engine Oil Notice: Do not add too much
oil. Oil levels above or below
It is a good idea to check the
the acceptable operating range
engine oil level at each fuel fill.
shown on the dipstick are harmful
In order to get an accurate reading,
to the engine. If you find that
the vehicle must be on level ground.
you have an oil level above the
The engine oil dipstick handle
operating range, i.e., the engine
is a yellow loop. See Engine
has so much oil that the oil level
Compartment Overview on
gets above the cross-hatched
page 10‑6 for the location If the oil is below the cross-hatched area that shows the proper
of the engine oil dipstick. area at the tip of the dipstick, add operating range, the engine
Obtaining an accurate oil level 1 L (1 qt) of the recommended could be damaged. You should
reading is essential: oil and then recheck the level. drain out the excess oil or limit
See “Selecting the Right Engine Oil” driving of the vehicle and seek a
1. If the engine has been running in this section for an explanation of
recently, turn off the engine and service professional to remove
what kind of oil to use. For engine the excess amount of oil.
allow several minutes for the oil oil crankcase capacity, see
to drain back into the oil pan. Capacities and Specifications on See Engine Compartment Overview
Checking the oil level too soon page 12‑2. on page 10‑6 for the location of the
after engine shutoff will not engine oil fill cap.
provide an accurate oil level
Add enough oil to put the level
reading.
somewhere in the proper operating
2. Pull out the dipstick and clean range. Push the dipstick all the way
it with a paper towel or cloth, back in when through.
then push it back in all the way.
Remove it again, keeping the tip
down, and check the level.

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GMC Sierra Owner Manual - 2011 Black plate (9,1)

Vehicle Care 10-9

Selecting the Right Engine Oil Failure to use the recommended

engine oil or equivalent can
Selecting the right engine oil
result in engine damage not
depends on both the proper oil
covered by the vehicle warranty.
specification and viscosity grade:
If you are unsure whether the
Specification oil is approved to the dexos
specification, ask your service
Use and ask for engine oils with This vehicle was filled at the factory provider.
the dexos™ certification mark. with dexos‐approved engine oil.
Oils meeting the requirements Use of Substitute Engine Oils if
Notice: Use only engine oil dexos is unavailable: In the event
of the vehicle should have the
that is approved to the dexos that dexos‐approved engine oil is
dexos certification mark on the
specification or an equivalent not available at an oil change or
container. This certification mark
engine oil of the appropriate for maintaining proper oil level,
indicates that the oil has been
viscosity grade. Engine oils you may use substitute engine oil
approved to the dexos specification.
approved to the dexos displaying the API Starburst symbol
specification will show the and of SAE 5W-30 viscosity grade.
dexos symbol on the container.

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GMC Sierra Owner Manual - 2011 Black plate (10,1)

10-10 Vehicle Care

Use of oils that do not meet the Cold Temperature Operation: In an

dexos specification, however, may area of extreme cold, where the
result in reduced performance under temperature falls below −29°C
certain circumstances. (−20°F), an SAE 0W-30 oil
should be used. An oil of this
Viscosity Grade viscosity grade will provide easier
SAE 5W-30 is the best viscosity cold starting for the engine at
grade for the vehicle. Do not extremely low temperatures.
use other viscosity oils such as When selecting an oil of the
SAE 10W‐30, 10W‐40, or 20W-50. appropriate viscosity grade, be
sure to always select an oil that
meets the required specification,
dexos. See “Specification” earlier
in this section for more information.

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GMC Sierra Owner Manual - 2011 Black plate (11,1)

Vehicle Care 10-11

Engine Oil Additives/Engine What to Do with Used Oil Engine Oil Life System
Oil Flushes Used engine oil contains certain When to Change Engine Oil
Do not add anything to the oil. elements that can be unhealthy for
The recommended oils with the your skin and could even cause This vehicle has a computer system
dexos specification and displaying cancer. Do not let used oil stay on that indicates when to change the
the dexos certification mark are all your skin for very long. Clean your engine oil and filter. This is based
that is needed for good performance skin and nails with soap and water, on engine revolutions and engine
and engine protection. or a good hand cleaner. Wash or temperature, and not on mileage.
properly dispose of clothing or rags Based on driving conditions, the
Engine oil system flushes are not mileage at which an oil change is
containing used engine oil. See the
recommended and could cause indicated can vary considerably.
manufacturer's warnings about the
engine damage not covered by For the oil life system to work
use and disposal of oil products.
the vehicle warranty. properly, the system must be reset
Used oil can be a threat to the
every time the oil is changed.
environment. If you change your
own oil, be sure to drain all the On some vehicles, when the system
oil from the filter before disposal. has calculated that oil life has been
Never dispose of oil by putting it diminished, a CHANGE ENGINE
in the trash or pouring it on the OIL SOON message comes on
ground, into sewers, or into streams to indicate that an oil change is
or bodies of water. Recycle it by necessary. See Engine Oil
taking it to a place that collects Messages on page 5‑45. Change
used oil. the oil as soon as possible within
the next 1 000 km (600 miles).

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GMC Sierra Owner Manual - 2011 Black plate (12,1)

10-12 Vehicle Care

It is possible that, if driving under How to Reset the Engine Oil On all vehicles, the Engine Oil Life
the best conditions, the oil life Life System System can be reset as follows:
system might indicate that an oil 1. Turn the ignition to ON/RUN with
change is not necessary for up Reset the system whenever the
engine oil is changed so that the the engine off.
to a year. The engine oil and filter
must be changed at least once system can calculate the next 2. Fully press the accelerator
a year and, at this time, the engine oil change. Always reset the pedal slowly three times within
system must be reset. For vehicles engine oil life to 100% after every five seconds.
without the CHANGE ENGINE OIL oil change. It will not reset itself.
To reset the system on most 3. Display the OIL LIFE
SOON message, an oil change REMAINING on the DIC.
is needed when the OIL LIFE vehicles:
If the display shows 100%,
REMAINING percentage is near 1. Display the OIL LIFE the system is reset. See Driver
0%. Your dealer has trained service REMAINING on the DIC. Information Center (DIC) on
people who will perform this work If the vehicle does not have page 5‑33.
and reset the system. It is also DIC buttons, the vehicle must
important to check the oil regularly be in P (Park) to access this If the vehicle has a CHANGE
over the course of an oil drain display. See Driver Information ENGINE OIL SOON message
interval and keep it at the proper Center (DIC) on page 5‑33. and it comes back on when
level. the vehicle is started and/or the
2. Press and hold the SET/RESET OIL LIFE REMAINING is near 0%,
If the system is ever reset button on the DIC, or the the engine oil life system has not
accidentally, the oil must be trip odometer reset stem been reset. Repeat the procedure.
changed at 5 000 km (3,000 miles) if the vehicle does not have
since the last oil change. DIC buttons, for more than
Remember to reset the oil life five seconds. The oil life will
system whenever the oil is changed. change to 100%.

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GMC Sierra Owner Manual - 2011 Black plate (13,1)

Vehicle Care 10-13

Automatic How to Check Automatic Wait at least 30 minutes before

Transmission Fluid checking the transmission fluid
Transmission Fluid level if you have been driving:
(4-Speed Transmission) Because this operation can be a
little difficult, it may be best to have . When outside temperatures are
When to Check and Change this done at the dealer service above 32°C (90°F).
Automatic Transmission Fluid department. . At high speed for quite a while.
A good time to check the automatic If not taken to the dealer, be sure to . In heavy traffic — especially in
transmission fluid level is when the follow all the instructions here or a hot weather.
engine oil is changed. false reading on the dipstick could
result.
. While pulling a trailer.
Change the fluid and filter at
the intervals listed in Scheduled Notice: Too much or too To get the right reading, the fluid
Maintenance on page 11‑2 and be little fluid can damage the should be at normal operating
sure to use the transmission fluid transmission. Too much can temperature, which is 82°C to 93°C
listed in Recommended Fluids and mean that some of the fluid could (180°F to 200°F).
Lubricants on page 11‑8. come out and fall on hot engine Get the vehicle warmed up by
parts or exhaust system parts, driving about 24 km (15 miles) when
starting a fire. Too little fluid outside temperatures are above
could cause the transmission 10°C (50°F). If it is colder than 10°C
to overheat. Be sure to get an (50°F), drive the vehicle in 3 (Third)
accurate reading if checking until the engine temperature gauge
the transmission fluid. moves and then remains steady for
10 minutes.

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GMC Sierra Owner Manual - 2011 Black plate (14,1)

10-14 Vehicle Care

A cold fluid check can be made Checking the Fluid Level Then, without shutting off the
after the vehicle has been sitting Prepare the vehicle as follows: engine, follow these steps:
for eight hours or more with the
engine off, but this is used only 1. Park the vehicle on a level
as a reference. Let the engine place. Keep the engine running.
run at idle for five minutes if outside 2. With the parking brake applied,
temperatures are 10°C (50°F) place the shift lever in P (Park).
or more. If it is colder than 10°C
(50°F), the engine may have to idle 3. With your foot on the brake
longer. Should the fluid level be low pedal, move the shift lever 1. Locate the transmission dipstick
during this cold check, the fluid must through each gear range, handle with this graphic which is
be checked when hot before adding pausing for about three seconds located at the rear of the engine
fluid. Checking the fluid hot will give in each range. Then, position compartment, on the passenger
you a more accurate reading of the the shift lever in P (Park). side of the vehicle.
fluid level. 4. Let the engine run at idle for See Engine Compartment
three minutes or more. Overview on page 10‑6 for
more information on location.
2. Flip the handle up, then pull out
the dipstick and wipe it with a
clean rag or paper towel.
3. Push it back in all the way, wait
three seconds and then pull it
back out again.

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GMC Sierra Owner Manual - 2011 Black plate (15,1)

Vehicle Care 10-15

Consistency of Readings Notice: Use of the incorrect

Always check the fluid level at least automatic transmission fluid
twice using the procedure described may damage the vehicle, and the
previously. Consistency (repeatable damages may not be covered by
readings) is important to maintaining the vehicle warranty. Always use
proper fluid level. If readings are still the automatic transmission fluid
inconsistent, contact the dealer. listed in Recommended Fluids
4. Check both sides of the dipstick, and Lubricants on page 11‑8.
and read the lower level. The How to Add Automatic
fluid level must be in the COLD . After adding fluid, recheck the
area, below the cross-hatched Transmission Fluid fluid level as described under
area, for a cold check or in the Refer to Recommended Fluids “How to Check Automatic
HOT or cross-hatched area for a and Lubricants on page 11‑8 to Transmission Fluid,” earlier
hot check. Be sure to keep the determine what kind of transmission in this section.
dipstick pointed down to get an fluid to use. . When the correct fluid level
accurate reading. Using a funnel, add fluid down is obtained, push the dipstick
5. If the fluid level is in the the transmission dipstick tube only back in all the way; then flip the
acceptable range, push the after checking the transmission handle down to lock the dipstick
dipstick back in all the way; fluid while it is hot. A cold check in place.
then flip the handle down to is used only as a reference. If the
lock the dipstick in place. fluid level is low, add only enough
of the proper fluid to bring the
level up to the HOT area for a hot
check. It does not take much fluid,
generally less than 0.5 Liter (1 Pint).
Do not overfill.

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GMC Sierra Owner Manual - 2011 Black plate (16,1)

10-16 Vehicle Care

Automatic Notice: Use of the incorrect How to Check Automatic

automatic transmission fluid Transmission Fluid
Transmission Fluid may damage the vehicle, and the
(6-Speed Transmission) damages may not be covered by Notice: Too much or too
the vehicle warranty. Always use little fluid can damage the
When to Check and Change the automatic transmission fluid transmission. Too much can
Automatic Transmission Fluid listed in Recommended Fluids mean that some of the fluid could
and Lubricants on page 11‑8. come out and fall on hot engine
It is usually not necessary to
parts or exhaust system parts,
check the transmission fluid level. Change the fluid and filter starting a fire. Too little fluid
The only reason for fluid loss is a at the scheduled maintenance could cause the transmission
transmission leak or overheated intervals listed in Scheduled to overheat. Be sure to get an
transmission. If a small leak is Maintenance on page 11‑2. accurate reading if checking
suspected, then use the following Be sure to use the transmission the transmission fluid.
checking procedures to check the fluid listed in Recommended Fluids
fluid level. However, if there is a and Lubricants on page 11‑8. Before checking the fluid level,
large leak, then it may be necessary prepare the vehicle as follows:
to have the vehicle towed to a 1. Start the engine and park the
dealer service department and have vehicle on a level surface.
it repaired before driving the vehicle Keep the engine running.
further.
2. Apply the parking brake and
place the shift lever in P (Park).

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GMC Sierra Owner Manual - 2011 Black plate (17,1)

Vehicle Care 10-17

3. With your foot on the brake Cold Check Procedure

pedal, move the shift lever Use this procedure only as a
through each gear range, reference to determine if the
pausing for about three seconds transmission has enough fluid
in each range. Then, move the to be operated safely until a hot
shift lever back to P (Park). check procedure can be made. 1. Locate the transmission
4. Allow the engine to idle The hot check procedure is the dipstick at the rear of the engine
(500 – 800 rpm) for at least most accurate method to check the compartment, on the passenger
1 minute. Slowly release the fluid level. Perform the hot check side of the vehicle.
brake pedal. procedure at the first opportunity. See Engine Compartment
5. Keep the engine running and Use this cold check procedure Overview on page 10‑6 for
press the Trip/Fuel button or to check fluid level when the more information.
trip odometer reset stem until transmission temperature is
2. Flip the handle up, then pull out
TRANS TEMP (Transmission between 27°C and 32°C
the dipstick and wipe it with a
Temperature) displays on the (80°F and 90°F).
clean rag or paper towel.
Driver Information Center (DIC).
3. Install the dipstick by pushing
6. Using the TRANS TEMP it back in all the way; wait
reading, determine and three seconds, and then pull
perform the appropriate check it back out again.
procedure. If the TRANS TEMP
4. Check both sides of the dipstick
reading is not within the required
and read the lower level. Repeat
temperature ranges, allow the
the check procedure to verify the
vehicle to cool, or operate the
reading.
vehicle until the appropriate
transmission fluid temperature
is reached.

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GMC Sierra Owner Manual - 2011 Black plate (18,1)

10-18 Vehicle Care

Hot Check Procedure

Use this procedure to check the
transmission fluid level when the
transmission fluid temperature
is between 71°C and 93°C
(160°F and 200°F).
1. Locate the transmission
5. If the fluid level is below the The hot check is the most accurate dipstick at the rear of the engine
COLD check band, add only method to check the fluid level. compartment, on the passenger
enough fluid as necessary to The hot check should be performed side of the vehicle.
bring the level into the COLD at the first opportunity in order to
band. It does not take much verify the cold check. The fluid level See Engine Compartment
fluid, generally less than 0.5 Liter rises as fluid temperature increases, Overview on page 10‑6 for
(1 Pint). Do not overfill. so it is important to ensure the more information.
6. Perform a hot check at transmission temperature is within 2. Flip the handle up, then pull out
the first opportunity after the range. the dipstick and wipe it with a
transmission reaches a normal clean rag or paper towel.
operating temperature between 3. Install the dipstick by pushing
71°C to 93°C (160°F to 200°F). it back in all the way; wait
7. If the fluid level is in the three seconds, and then pull
acceptable range, push the it back out again.
dipstick back in all the way, 4. Check both sides of the dipstick
then flip the handle down to and read the lower level. Repeat
lock the dipstick in place. the check procedure to verify the
reading.

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GMC Sierra Owner Manual - 2011 Black plate (19,1)

Vehicle Care 10-19

Consistency of Readings When to Inspect the Engine Air

Always check the fluid level at least Cleaner/Filter
twice using the procedure described Inspect the air cleaner/filter at
previously. Consistency (repeatable the scheduled maintenance
readings) is important to maintaining intervals and replace it at the first
proper fluid level. If readings are still oil change after each 80 000 km
5. Safe operating level is within the inconsistent, contact the dealer. (50,000 mi) interval. See Scheduled
HOT cross hatch band on the Maintenance on page 11‑2 for more
dipstick. If the fluid level is not Engine Air Cleaner/Filter information. If driving on dusty/dirty
within the HOT band, and the conditions, inspect the filter at each
transmission temperature is If the vehicle has a diesel engine,
engine oil change.
between 71°C and 93°C (160°F see “Pickup Models” under “Engine
and 200°F), add or drain fluid as Air Cleaner/Filter” in the Duramax® How to Inspect the Engine Air
necessary to bring the level into Diesel Supplement for the correct Cleaner/Filter
the HOT band. If the fluid level inspection and replacement
procedures. To inspect the air cleaner/filter,
is low, add only enough fluid remove the engine air cleaner/
to bring the level into the HOT See Engine Compartment Overview filter from the vehicle by following
band. It does not take much on page 10‑6 for the location of the Steps 1 through 6. When the engine
fluid, generally less than 0.5 L engine air cleaner/filter. air cleaner/filter is removed, lightly
(1 pint). Do not overfill. shake it to release loose dust and
6. If the fluid level is in the dirt. If the engine air cleaner/filter
acceptable range, push the remains covered with dirt, a new
dipstick back in all the way, filter is required. Never use
then flip the handle down to compressed air to clean the filter.
lock the dipstick in place.

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GMC Sierra Owner Manual - 2011 Black plate (20,1)

10-20 Vehicle Care

Replacing the Engine Air

Cleaner/Filter { WARNING
Operating the engine with the air
cleaner/filter off can cause you
or others to be burned. The air
cleaner not only cleans the air;
it helps to stop flames if the
engine backfires. Use caution
when working on the engine
and do not drive with the air
cleaner/filter off.
3. Remove the engine air
cleaner/filter from the housing. Cooling System
Take care to dislodge as little
1. Locate the air cleaner/filter dirt as possible. If the vehicle has the Duramax®
assembly. See Engine Diesel engine, see the Duramax®
Compartment Overview on 4. Clean the engine air Diesel Supplement for more
page 10‑6. cleaner/filter sealing surfaces information.
and the housing.
2. Loosen the four screws on the The cooling system allows the
cover of the housing and lift up 5. Inspect or replace the engine air engine to maintain the correct
the cover. cleaner/filter. working temperature.
6. Reinstall the cover and tighten
the screws.

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GMC Sierra Owner Manual - 2011 Black plate (21,1)

Vehicle Care 10-21

{ WARNING WARNING (Continued)

An electric engine cooling fan Do not run the engine if there is
can start even when the engine a leak. If you run the engine, it
is not running. To avoid injury, could lose all coolant. That could
always keep hands, clothing, cause an engine fire, and you
and tools away from any engine could be burned. Get any leak
cooling fan. fixed before you drive the vehicle.

Notice: Using coolant other than

5.3 L Engine Shown (4.3 L, 4.8 L,

{ WARNING DEX-COOL® can cause premature
engine, heater core, or radiator
6.0 L and, 6.2 L Engines Similar) Heater and radiator hoses, and corrosion. In addition, the engine
other engine parts, can be very coolant could require changing
A. Coolant Surge Tank
hot. Do not touch them. If you do, sooner, at 50 000 km (30,000 mi)
B. Coolant Surge Tank you can be burned. or 24 months, whichever occurs
Pressure Cap first. Any repairs would not be
(Continued)
C. Engine Cooling Fan covered by the vehicle warranty.
(Out of View) Always use DEX-COOL
(silicate-free) coolant in the
vehicle.

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GMC Sierra Owner Manual - 2011 Black plate (22,1)

10-22 Vehicle Care

Engine Coolant What to Use Use a 50/50 mixture of clean,

drinkable water and DEX-COOL
The cooling system in the vehicle
is filled with DEX-COOL® engine { WARNING coolant. If using this mixture,
nothing else needs to be added.
coolant. This coolant is designed to This mixture:
Adding only plain water or some
remain in the vehicle for 5 years or
other liquid to the cooling system . Gives freezing protection down
240 000 km (150,000 mi), whichever
occurs first. can be dangerous. Plain water to −37°C (−34°F), outside
and other liquids, can boil before temperature
The following explains the cooling the proper coolant mixture will.
system and how to check and add
. Gives boiling protection
The coolant warning system is up to 129°C (265°F), engine
coolant when it is low. If there is a set for the proper coolant mixture.
problem with engine overheating, temperature
With plain water or the wrong
see Engine Overheating on mixture, the engine could get too
. Protects against rust and
page 10‑25. corrosion
hot but you would not get the
overheat warning. The engine . Will not damage aluminum parts
could catch fire and you or . Helps keep the proper engine
others could be burned. Use a temperature
50/50 mixture of clean, drinkable
water and DEX-COOL coolant. Notice: If an improper coolant
mixture is used, the engine could
overheat and be badly damaged.
The repair cost would not be
covered by the vehicle warranty.
Too much water in the mixture
can freeze and crack the engine,
radiator, heater core, and other
parts.
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GMC Sierra Owner Manual - 2011 Black plate (23,1)

Vehicle Care 10-23

Notice: If extra inhibitors Checking Coolant

and/or additives are used in
The coolant surge tank is located
the vehicle cooling system,
in the engine compartment on the
the vehicle could be damaged.
passenger side of the vehicle.
Use only the proper mixture of
See Engine Compartment Overview
the engine coolant listed in this
on page 10‑6 for more information
manual for the cooling system.
on location.
See Recommended Fluids and
Lubricants on page 11‑8 for more The vehicle must be on a level
information. surface when checking the coolant
level.
Never dispose of engine coolant
by putting it in the trash, pouring Check to see if coolant is visible
it on the ground, or into sewers, in the coolant surge tank. If the The coolant level should be at or
streams, or bodies of water. coolant inside the coolant surge above the FULL COLD mark. If it is
Have the coolant changed by an tank is boiling, do not do anything not, there may be a leak in the
authorized service center, familiar else until it cools down. If coolant is cooling system.
with legal requirements regarding visible but the coolant level is not at
used coolant disposal. This will help or above the FULL COLD mark, add
protect the environment and your a 50/50 mixture of clean, drinkable
health. water and DEX-COOL coolant at the
coolant surge tank, but be sure the
cooling system is cool before this
is done.

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GMC Sierra Owner Manual - 2011 Black plate (24,1)

10-24 Vehicle Care

How to Add Coolant to the If no coolant is visible in the surge

Coolant Surge Tank for { WARNING tank, add coolant as follows:
Gasoline Engines An electric engine cooling fan
If the vehicle has a diesel engine, under the hood can start up even
see “Cooling System” in the when the engine is not running
Duramax Diesel Supplement for and can cause injury. Keep
the proper coolant fill procedure. hands, clothing, and tools away
from any underhood electric fan.
{ WARNING 1. Remove the coolant surge tank
pressure cap when the cooling
You can be burned if you spill system, including the coolant
coolant on hot engine parts. { WARNING surge tank pressure cap and
Coolant contains ethylene glycol upper radiator hose, is no
Steam and scalding liquids from a
and it will burn if the engine parts longer hot.
hot cooling system can blow out
are hot enough. Do not spill
and burn you badly. They are Turn the pressure cap slowly
coolant on a hot engine. counterclockwise about one full
under pressure, and if you turn
the coolant surge tank pressure turn. If a hiss is heard, wait for
Notice: This vehicle has a cap — even a little — they can that to stop. A hiss means there
specific coolant fill procedure. come out at high speed. Never is still some pressure left.
Failure to follow this procedure turn the cap when the cooling 2. Keep turning the pressure cap
could cause the engine to system, including the coolant slowly, and remove it.
overheat and be severely surge tank pressure cap, is hot.
damaged. Wait for the cooling system and
coolant surge tank pressure cap
to cool if you ever have to turn
the pressure cap.
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GMC Sierra Owner Manual - 2011 Black plate (25,1)

Vehicle Care 10-25

By this time, the coolant level Engine Overheating

inside the coolant surge tank
may be lower. If the level is If the vehicle has the Duramax®
lower, add more of the proper Diesel engine, see the Duramax
mixture to the coolant surge Diesel Supplement for more
tank until the level reaches the information.
FULL COLD mark. The vehicle has several indicators
5. Replace the pressure cap. to warn of engine overheating.
Be sure the pressure cap is There is a coolant temperature
hand-tight and fully seated. gauge on the vehicle's instrument
6. Verify coolant level after the panel. See Engine Coolant
engine is shut off and the Temperature Gauge on page 5‑17.
3. Fill the coolant surge tank coolant is cold. If necessary, In addition, there are ENGINE
with the proper mixture to the repeat coolant fill procedure OVERHEATED STOP ENGINE,
FULL COLD mark. Steps 1 through 6. ENGINE OVERHEATED IDLE
4. With the coolant surge tank Notice: If the pressure cap is ENGINE, and ENGINE POWER IS
pressure cap off, start the not tightly installed, coolant loss REDUCED messages in the Driver
engine and let it run until the and possible engine damage may Information Center (DIC) on the
engine coolant temperature occur. Be sure the cap is properly instrument panel. See Engine
gauge indicates approximately and tightly secured. Cooling System Messages on
90°C (195°F). page 5‑44 and Engine Power
Messages on page 5‑45.

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GMC Sierra Owner Manual - 2011 Black plate (26,1)

10-26 Vehicle Care

If the decision is made not to lift the Notice: If the engine catches fire
hood when this warning appears, while driving with no coolant, the WARNING (Continued)
get service help right away. vehicle can be badly damaged.
See Roadside Assistance Program The costly repairs would not If you keep driving when the
(U.S. and Canada) on page 13‑8 be covered by the vehicle vehicles engine is overheated,
or Roadside Assistance Program warranty. See Overheated Engine the liquids in it can catch fire.
(Mexico) on page 13‑10. Protection Operating Mode on You or others could be badly
page 10‑28 for information on burned. Stop the engine if it
If the decision is made to lift the overheats, and get out of the
hood, make sure the vehicle is driving to a safe place in an
emergency. vehicle until the engine is cool.
parked on a level surface.
If Steam is Coming from the See Overheated Engine
Then check to see if the engine
cooling fans are running. If the Engine Compartment Protection Operating Mode on
engine is overheating, both fans page 10‑28 for information on
driving to a safe place in an
should be running. If they are not,
do not continue to run the engine
{ WARNING emergency.
and have the vehicle serviced. Steam from an overheated engine
Notice: Engine damage from can burn you badly, even if you
running your engine without just open the hood. Stay away
coolant is not covered by the from the engine if you see or
vehicle warranty. See Overheated hear steam coming from it.
Engine Protection Operating Turn it off and get everyone
Mode for information on driving away from the vehicle until it
to a safe place in an emergency. cools down. Wait until there
is no sign of steam or coolant
before you open the hood.
(Continued)
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