2005 Chevrolet C1500 Pickup Silverado
Electrical Systems & Components / Electrical Systems / Fuses and Circuit Breakers /
FUSES & CIRCUIT BREAKERS
CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may
exist until computer systems have completed a relearn cycle. See appropriate COMPUTER RELEARN PROCEDURES
article in GENERAL INFORMATION before disconnecting battery.
IDENTIFICATION
FUSIBLE LINKS
For information on fusible links and repairing them, refer to illustration. See Fig. 1.
Fig. 1: Repairing Fusible Links
INSTRUMENT PANEL FUSE BLOCK
NOTE: Instrument Panel (I/P) fuse block (left) is located at the left side of the I/P behind the access panel. See Fig. 2.
Fig. 2: Locating Left Instrument Panel Fuse Block
Fig. 3: Identifying Left Instrument Panel Fuse Block Components
Fuse Block - I/P
Device Rating Description
RR WPR Fuse 15A Not Used
SEO ACCY Fuse 10A Upfitter Provisions
WS WPR Fuse 25A Windshield Wiper Motor and Module
TBC ACCY Fuse 10A Body Control Module (BCM)
IGN 3 Fuse 10A Rear Wheel Steering Control Module
4WD Fuse 15A Front Axle Actuator, Transfer Case Shift Control Switch, Auxiliary Battery Relay
HTR A/C Fuse 30A HVAC Control Module
LOCK Relay - Door Lock Actuators
HVAC 1 Fuse 10A HVAC Control Module, HVAC Actuators
Device Rating Description
L DOOR - 12-WAY - - Fuse Block - Left I/P C3 (Driver Door Harness)
BLACK
CRUISE Fuse 10A Cruise Control Switch, Cruise Control Module, Steering Wheel Speed/Position Sensor, Power
Take-Off (PTO) Switch
UNLOCK Relay - Door Unlock Actuators
RR FOG LP Relay - Fog Lamp - LR, Fog Lamp - RR (Export)
BRAKE Fuse 10A Stop Lamp Switch, Electronic Brake Control Module (EBCM), Clutch Start Switch
DRIVER UNLOCK - Door Latch Assembly-Driver (Base)
Relay
IGN O Fuse 10A Passlock Sensor, Automatic Transmission, Powertrain Control Module (PCM) - Gas, Engine
Control Module (ECM) - Diesel
TBC IGN O Fuse 10A Body Control Module (BCM)
VEH CHMSL Fuse 10A Center High Mounted Stop Lamp (CHMSL)
LT TRLR ST/TRN 10A Trailer Wiring Provisions
Fuse
LT TRN Fuse 10A Turn Signal Lamps - Left, Marker Lamps - Left, Driver Door Module (DDM), Instrument Panel
Cluster (IPC)
VEH STOP Fuse 15A Tail/Stop and Turn Signal Lamps-Rear, Throttle Actuator Control (TAC)
BODY - 12-WAY - - Fuse Block - Left I/P C4 (Body Harness)
BROWN
RT TRLR ST/TRN 10A Trailer Wiring Provisions
Fuse
RT TRN Fuse 10A Turn Signal Lamps - Right, Marker Lamps - Right, Front Passenger Door Module (FPDM),
Instrument Panel Cluster (IPC)
DDM Fuse 15A Driver Door Module (DDM)
AUX PWR 2 Fuse 20A I/P Accessory Power Outlets, Accessory Power Outlet - Rear
LOCKS Fuse 20A Door Lock/Unlock Relays
ECC Fuse 10A Not Used
TBC 2C Fuse 15A Body Control Module (BCM)
FLASH Fuse 25A Turn Signal/Hazard Flasher Module
CB - LT DOORS 25A Window Switch - LR, Driver Door Module (DDM)
TBC 2B Fuse 15A Body Control Module (BCM)
TBC 2A Fuse 15A Body Control Module (BCM)
INSTRUMENT PANEL RELAY BLOCK
NOTE: Instrument panel relay block is located below instrument panel to the left of the steering column.
Fig. 4: Instrument Panel Relay Block
Relay Block I/P
Device Rating Description
SEO - 6-WAY - - Mobile Radio and Emergency Lighting
BLK
TRAILER - 6-WAY - Trailer Provisions
- BRN
UPFIT - 4-WAY - - Upfitter Provisions
CRM
SL RIDE - 6-WAY - - Manual Selectable Ride (MSR)
GRY
HDLNR 2 - 6-WAY - Air Temperature Assembly - Inside, Blower Motor Control Processor, HVAC Actuators, Inside
- CRM Rearview Mirror
BODY - 12-WAY - - Door Courtesy Lamps, Driver/Passenger Seat Modules, Heated Seat Module - LR/RR, Rear
WHT Window Defogger Grid, Automatic Occupant Sensing
DEFOG Relay - Rear Window Defogger Grid
(C49)
HDLNR 1 - 6-WAY - Courtesy Reading Lamps, Garage Door Opener, Inside Rearview Mirror, Vanity Mirror Lamps
- BRN
SPARE Relay - Not Used
CB - SEAT 30A Driver/Passenger Seat Modules
CB - RT - DOOR 25A Front Passenger Door Module (FPDM), Window Switch - RR
SPARE - 4-WAY - - Not Used
GRY
INFO - 12-WAY - - Rear Seat Audio (RSA) Module, OnStar Module, Audio Amplifier (Bose)
BLK
MOBILE RADIO FUSE BLOCK
NOTE: Mobile Radio fuse block is located at the right side of the instrument panel behind the instrument panel compartment.
Fig. 5: Identifying Mobile Radio Fuse Block Components
Fig. 6: Right Instrument Panel Fuse Block Legend
UNDERHOOD FUSE BLOCK
NOTE: Underhood fuse block is located at the left side of the engine compartment to the rear of the battery. See Fig. 7.
Fig. 7: Locating Underhood Fuse Block
Fig. 8: Identifying Underhood Fuse Block Components
Fuse Block - Underhood
Device Rating Description
STUD 1 Fuse - Trailer Wiring, Auxiliary Battery Relay and Battery Right (TP2), AUX HTR PMP Fuse
(HP2), ESCM Fuse (HP2), HCM-B Fuse (HP2) and TRANS PUMP Fuse (HP2)
MBEC 1 Fuse 50A SEAT CB, RT DOOR CB
BLWR Fuse 40A Blower Motor
LBEC 2 Fuse 50A LOCKS Fuse, DDM Fuse, PDM Fuse, ECC Fuse, AUX PWR 2 Fuse
Device Rating Description
STUD 2 Fuse 30A Trailer Wiring, Emergency Vehicle Roof Lamp Relay
ABS Fuse 60A Electronic Brake Control Module (EBCM)
VSES/ECAS Fuse 60A Not Used
IGN A Fuse 40A Ignition Switch RUN, START, RUN/START/ACCY, STARTER Relay
IGN B Fuse 40A Ignition Switch RUN/ACC, RUN/START
LBEC 1 Fuse 50A FLASH Fuse, TBC 2A Fuse, TBC 2B Fuse, TBC 2C Fuse, LT DOORS Fuse
TRL PARK Fuse 15A Trailer Wiring
RR PARK Fuse 10A Exterior Lamps-Right Rear, Clearance Lamps-Right
LR PARK Fuse 10A Exterior Lamps-Left Rear, Clearance Lamps-Left
PARK LP Relay - TRL PARK Fuse, LR PARK Fuse, RR PARK Fuse, FRT PARK Fuse, INT PARK Fuse
DRL Relay (Export)
STRTR Relay - Starter
INTPARK Fuse 10A Power Take-Off (PTO) Switch, Inflatable Restraint I/P Module Disable Switch
STOP LP Fuse 25A Stop Lamp Switch
TBC BATT Fuse 10A Body Control Module (BCM), PASS-Key Module
S/ROOF Fuse 25A Sunroof Module Control
SEO B2 Fuse 30A Roof Beacon Relay
4WS Fuse 15A Rear Wheel Steering Control Module, Evaporative Emission (EVAP) Canister Vent
Solenoid
RR HVAC 30A Not Used
AUX PWR Fuse 20A Accessory Power Outlets, Auxiliary Power Outlets
PCM 1 Fuse 15A Powertrain Control Module (PCM), Mass Air Flow (MAF) Sensor, Evaporative Emission
(EVAP) Canister Purge Solenoid, Fuel Composition Sensor, Secondary Fuel Pump Relay
ETC/ECM Fuse 15A Throttle Actuator Control (TAC)
INJ 1 Fuse (Gas)/ 15A Fuel Injectors-Odd-Numbered, Ignition Coils-Odd-Numbered (Gas)
ECMRPCV Fuse (Diesel)
#2 15A Engine Control Module (ECM) (Diesel)
INJ 2 Fuse (Gas)/EDU 15A Fuel Injectors-Even-Numbered, Ignition Coils-Even-Numbered (Gas)
Fuse (Diesel) #1
25A Fuel Injector Control Module (FICM) (Diesel)
IGN E Fuse 10A A/C COMP Relay, Park/Neutral Position (PNP) Switch, Turn Signal/Multifunction Switch,
Headlamp Leveling Components, Clutch Start Switch
IGN 1 Relay (Gas)/EDU - SBA Fuse, ETC/ECM Fuse, PCM 1 Fuse, INJ 1 Fuse, INJ 2 Fuse
Relay (Diesel) #5
- ECMRPCV Fuse, EDU Fuse (Diesel)
RTD Fuse 30A Not Used
TRL B/U Fuse 10A Body Control Module (BCM), Trailer Wiring, Back-Up Alarm
PCM B Fuse 20A Powertrain Control Module, F/PMP Relay
F/PMP Relay - Fuel Pump
O2 A Fuse (Gas)/FUEL HT 15A Heated Oxygen Sensors-Upstream (Gas)
Fuse (Diesel) #3
15A Fuel Heater, Glow Plug Controller, Intake Air (IA) Heater Relay, EGR System
Components (Diesel)
B/U LP Fuse 20A Park/Neutral Position (PNP) Switch
RR DEFOG Fuse 30A DEFOG Relay
HDLP-HI Relay - HI HDLP-LT Fuse, HI HDLP-RT Fuse
O2 B Fuse (Gas)/EMCI 15A Heated Oxygen Sensors-Downstream (Gas)
Device Rating Description
Fuse (Diesel) #4
15A IAT/MAF Sensor, Engine Control Module (ECM) (Diesel)
AIRBAG Fuse 15A Inflatable Restraint Sensing and Diagnostic Module (SDM), Memory Seat Module-
Passenger, Inside Rearview Mirror
FRT PARK Fuse 10A Park/Turn Signal Lamps-Front, Marker Lamps-Front
DRL Relay - DRL Lamp-LT, DRL Lamp-RT (Domestic)/DRL Fuse, FRT PARK Fuse (Export)
SEO IGN Fuse 10A DEFOG Relay, Instrument Panel Cluster (IPC)
TBC IGN 1 Fuse 10A Body Control Module (BCM)
HI HDLP-LT Fuse 10A Headlamp-High Beam-Left
LH HID Fuse 20A High Intensity Discharge Lamps
DRL Fuse 10A DRL Relay (Domestic)/Daytime Running Lamps (Export)
RVC Fuse 10A Generator Battery Control Module
IPC/DIC Fuse 10A Instrument Panel Cluster (IPC)
HVAC/ECAS Fuse 10A HVAC Control Module
CIG LTR Fuse 15A Cigar Lighter, Data Link Connector (DLC)
HI HDLP RT Fuse 10A Highbeam Headlamp-Right
HDLP-LOW Relay - LO HDLP-LT Fuse, LO HDLP-RT Fuse
A/C COMP Relay - A/C Compressor Clutch
A/C COMP Fuse 10A A/C Compressor Clutch Relay
RR WPR 25A Not Used
RADIO Fuse 15A Radio, Rear Seat Audio (RSA)
SEO B1 Fuse 15A Instrument Panel Cluster (IPC), Rear Fog Lamp Relay, Overhead Console, Roof Beacon
Switch
LO HDLP-LT Fuse 10A Headlamp-Low Beam-Left
BTSI Fuse 10A Stop Lamp Switch
CRNK Fuse 10A Powertrain Control Module (PCM)-Gas, Engine Control Module (ECM)-Diesel
LO HDLP-RT Fuse 25A Headlamp-Low Beam-Right
FOG LP Relay - Fog Lamp-RF, Fog Lamp-LF
FOG LP Fuse 15A FOG LP Relay
HORN Relay - HORN Fuse
W/S WASH Relay - Windshield Washer Fluid Pump
W/S WASH Fuse 15A W/S WASH Relay
INFO Fuse 15A Vehicle Communication Interface Module (VCIM), Rear Seat Entertainment (RSE)
Assembly, Remote Playback Device-CD Player
RADIO AMP Fuse 30A Audio Amplifier
RH HID Fuse 20A Not Used
HORN Fuse 15A Horn-Left, Horn-Right
EAP Fuse 15A Not Used
TREC Fuse 30A Transfer Case Encoder Motor, Transfer Case Shift Control Module
SBA Fuse 15A Supplemental Brake Assist (SBA)
UNDERHOOD COOLING FAN FUSE BLOCK (10 SERIES)
NOTE: Underhood cooling fan fuse block is located on left side of engine compartment to the rear of the battery.
Fig. 9: Identifying Underhood Cooling Fan FuseBlock Components
Fuse Block - Underhood - Cooling Fan (10 Series)
Device Rating Description
Cool/Fan Fuse 40A Cool/Fan 1 Relay
Cool/Fan Fuse 40A Cool/Fan 2 Relay
Cool/Fan Fuse 10A Cool/Fan 3 Relay
Cool/Fan 1 Relay - Cooling Fan - Left
Cool/Fan 2 Relay - Cooling Fan - Left and Right High Speed
Cool/Fan 3 Relay - Cooling Fan - Left and Right Low Speed
Article Section
Article Section
Article Section
Created/Modified Date: 12/16/2009 1:36:00 PM
