2007 Chevrolet Corvette

2007 SUSPENSION Front Suspension - Corvette

2007 SUSPENSION

Front Suspension - Corvette

SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS

Fastener Tightening Specifications

Specification
Application Metric English
Crossmember Mounting Nuts (Use New Nuts) 110 N.m 81 lb ft
Lower Control Arm Ball Joint Stud Nut

First Pass 30 N.m 20 lb ft
Final Pass

180 degrees
Power Steering Gear Mounting Bolts 100 N.m 74 lb ft
Shock Absorber Lower Mounting Nuts 28 N.m 21 lb ft
Shock Absorber Upper Mounting Nut 26 N.m 19 lb ft
Stabilizer Shaft Insulator Clamp Bolts 58 N.m 43 lb ft
Stabilizer Shaft Link Nuts 76 N.m 56 lb ft
Transverse Spring Retainer Bolts (Use New Bolts) 62 N.m 46 lb ft
Upper Control Arm Ball Joint Stud Nut

First Pass 30 N.m 22 lb ft
Final Pass

225 degrees
Upper Control Arm Mounting Bolts 65 N.m 48 lb ft
Wheel Hub/Bearing Mounting Bolts 130 N.m 96 lb ft

REPAIR INSTRUCTIONS
STABILIZER SHAFT REPLACEMENT

Removal Procedure

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Fig. 1: Stabilizer Shaft Insulator Clamps, Stabilizer Shaft Link & Nuts
Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
Information.
2. Remove the tire and wheel assemblies. Refer to Tire and Wheel Removal and
Installation in Tires and Wheels.
3. Remove the stabilizer shaft link nuts from the stabilizer shaft.
4. Remove the stabilizer shaft insulator clamps from the front crossmember.
5. Remove the stabilizer shaft from the vehicle.
Installation Procedure

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Fig. 2: Stabilizer Shaft Insulator Clamps, Stabilizer Shaft Link & Nuts
Courtesy of GENERAL MOTORS CORP.

1. Install the stabilizer shaft, insulator clamps and bolts to the crossmember.
2. Install the stabilizer shaft links to the stabilizer shaft.

NOTE: Refer to Fastener Notice .

3. Install the stabilizer shaft link nuts.

Tighten: Tighten the stabilizer shaft link nuts to 76 N.m (56 lb ft).

4. Install the stabilizer shaft insulator clamp bolts.

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Tighten: Tighten the stabilizer shaft insulator clamp bolts to 58 N.m (43 lb ft).

5. Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation
in Tires and Wheels.
6. Lower the vehicle.

STABILIZER SHAFT LINK REPLACEMENT

Removal Procedure

Fig. 3: Stabilizer Shaft Insulator Clamps, Stabilizer Shaft Link & Nuts
Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
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Information.
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation
in Tires and Wheels.
3. Remove the stabilizer shaft link nuts.
4. Remove the stabilizer shaft link from the stabilizer shaft and lower control arm.
Installation Procedure

Fig. 4: Stabilizer Shaft Insulator Clamps, Stabilizer Shaft Link & Nuts
Courtesy of GENERAL MOTORS CORP.

1. Install the stabilizer shaft link into the stabilizer shaft and lower control arm.

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NOTE: Refer to Fastener Notice .

2. Install the stabilizer shaft link nuts.

Tighten: Tighten the stabilizer shaft link nuts to 76 N.m (56 lb ft).

3. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in
Tires and Wheels.
4. Lower the vehicle.

STABILIZER SHAFT INSULATOR REPLACEMENT

Removal Procedure

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Fig. 5: Stabilizer Shaft Insulator Clamps, Stabilizer Shaft Link & Nuts
Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
Information.
2. Remove the tire and wheel assemblies. Refer to Tire and Wheel Removal and
Installation in Tires and Wheels.
3. Remove the stabilizer shaft from the vehicle. Refer to Stabilizer Shaft Replacement.
4. Remove the stabilizer shaft insulators from the stabilizer shaft.
Installation Procedure

Fig. 6: Stabilizer Shaft Insulator Clamps, Stabilizer Shaft Link & Nuts
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Courtesy of GENERAL MOTORS CORP.

1. Install the stabilizer shaft insulators to the stabilizer shaft.

NOTE: Refer to Fastener Notice in Cautions and Notices.

2. Install the stabilizer shaft to the vehicle.

Tighten: Tighten the bolts to 58 N.m (43 lb ft).

3. Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation
in Tires and Wheels.
4. Lower the vehicle.

FRONT TRANSVERSE SPRING REPLACEMENT

Tools Required

J 33432-A Transverse Spring Compressor

J 42188 Ball Joint Separator
Removal Procedure

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Fig. 7: Distance Measured Between J42743 & Spring Adjuster Bolt

Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
Information.
2. Remove the tire and wheel assemblies. Refer to Tire and Wheel Removal and
Installation in Tires and Wheels.
3. If the transverse spring is to be replaced, measure the front spring adjuster bolt gap (1).

This measurement will be used in the installation procedure to setup the vehicle trim height.

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Fig. 8: Leaf Spring Fixture

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: During this procedure, use care not to scratch the transverse
spring.

4. Install the transverse spring compressor J 33432-A to the transverse spring.

5. Compress the transverse spring.
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Fig. 9: Lower Shock Absorber & Bolts

Courtesy of GENERAL MOTORS CORP.

6. Remove the lower shock absorber mounting bolts from one of the lower control arms.

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Fig. 10: Stabilizer Shaft Link & Lower Control Arm

Courtesy of GENERAL MOTORS CORP.

7. Disconnect the stabilizer shaft link from the lower control arm.

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Fig. 11: J 42188, Outer Tie Rod & Stud Nut, Outer Tie Rod & Ball Stud
Courtesy of GENERAL MOTORS CORP.

8. Loosen the lower ball joint stud nut (2) on the lower control arm. Do not remove the nut.
9. Separate the lower the ball joint from the steering knuckle using ball joint separator tool J
42188 .

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Fig. 12: Lower Control Arm Ball Joint Stud & Steering Knuckle
Courtesy of GENERAL MOTORS CORP.

10. Remove the ball joint separator tool.

11. Remove the lower ball joint stud nut and discard.
12. Support the lower control arms with jackstands.

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Fig. 13: Lower Control Arm, Crossmember & Components

Courtesy of GENERAL MOTORS CORP.

13. Mark the position of the cam bolts for reference at reinstallation.
14. Remove the cam bolts from the lower control arm.
15. Remove the lower control arm.

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Fig. 14: Transverse Spring Bolts, Retainers & Crossmember

Courtesy of GENERAL MOTORS CORP.

16. Remove the transverse spring bolts and retainers.

17. Discard the old transverse spring bolts
18. Remove the transverse spring from the vehicle.
19. Remove the transverse spring compressor from the transverse spring, if the spring is to be
replaced.
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Installation Procedure

Fig. 15: Leaf Spring Fixture

Courtesy of GENERAL MOTORS CORP.

1. Install the transverse spring compressor J 33432-A to the transverse spring.

2. Install the transverse spring to the crossmember.

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Fig. 16: Transverse Spring Bolts, Retainers & Crossmember

Courtesy of GENERAL MOTORS CORP.

NOTE: Do not remove the transverse leaf spring compressor tool until
after the shock absorber has been installed. The pad on the
transverse leaf spring bolt could move out of position resulting
in damage to the pad or a rattle in the suspension.

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NOTE: Refer to Fastener Notice in Cautions and Notices.

3. Install the transverse spring retainers and bolts (Use New Bolts) to the crossmember.

Tighten: Tighten the transverse spring retainer bolts (Use New Bolts) to 62 N.m (46 lb ft).

Fig. 17: Lower Control Arm, Crossmember & Components

Courtesy of GENERAL MOTORS CORP.

4. Install the lower control arm to the front crossmember.

5. Install the cam bolts to the position that was marked during disassembly.

Due to a required wheel alignment, tighten the cam bolts but do not set to the final torque
specification at this time.

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Fig. 18: Lower Control Arm Ball Joint Stud & Steering Knuckle
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Use a new ball joint stud nut.

6. Install the lower control arm ball joint stud to the steering knuckle.

Tighten: Tighten the lower control arm ball joint stud nut to 30 N.m (20 lb ft) plus 180
degrees.

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Fig. 19: Lower Shock Absorber & Bolts

Courtesy of GENERAL MOTORS CORP.

7. Support the lower control arm with a jackstand.

8. Install the shock absorber lower mounting bolts.

Tighten: Tighten the shock absorber lower mounting nuts to 28 N.m (21 lb ft).

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Fig. 20: Stabilizer Shaft Link & Lower Control Arm

Courtesy of GENERAL MOTORS CORP.

9. Connect the stabilizer shaft link to the lower control arm.

Tighten: Tighten the stabilizer link nut to 72 N.m (53 lb ft).

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Fig. 21: Leaf Spring Fixture

Courtesy of GENERAL MOTORS CORP.

10. Remove the J 33432-A transverse spring compressor from the transverse spring.
11. Remove the jackstands from the lower control arms.
12. Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation
in Tires and Wheels.
13. Adjust the front trim height. Refer to Trim Height Specifications in Suspension General
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Diagnosis.
14. Perform a front wheel alignment. Refer to Measuring Wheel Alignment in Wheel
Alignment.

UPPER BALL JOINT REPLACEMENT

The upper ball joint is replaced as part of the steering knuckle. Refer to Steering Knuckle
Replacement.

WHEEL BEARING/HUB REPLACEMENT - FRONT

Tools Required

J 42188 Ball Joint Separator

Removal Procedure

NOTE: The Front and Rear Wheel Hub/Wheel Speed Sensors are not
interchangeable. When you are replacing a Wheel Hub/Wheel Speed
Sensor be sure to use the correct Wheel Hub/Wheel Speed Sensor
part number. Do not mount the Rear Wheel Hub/Wheel Speed
Sensor in the front steering knuckle. The Rear Wheel Hub/Wheel
Speed Sensor features a splined hole through the center of the
bearing which mates to the drive axle. The Rear Wheel Hub/Wheel
Speed Sensor requires the support of the drive axle and the drive
axle nut clamped joint to properly carry the vehicle loads. Mounting
the Rear Wheel Hub/Wheel Speed Sensor in the front steering
knuckle can cause bearing failure and possible damage to the
vehicle.

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Fig. 22: View Of Rear Wheel Speed Sensor Harness Connector

Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
Information.
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation
in Tires and Wheels.
3. Disconnect the wheel speed sensor electrical connector.
4. Remove the brake caliper and rotor. Refer to Front Brake Rotor Replacement and Front
Brake Caliper Replacement (J56) or Front Brake Caliper Replacement (JL9-J55) in
Disc Brakes.

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Fig. 23: Stabilizer Shaft Link & Lower Control Arm

Courtesy of GENERAL MOTORS CORP.

5. Remove the stabilizer shaft link from the lower control arm.
6. Support the lower control arm using a jackstand.

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Fig. 24: Upper, Lower Control Arms With Components

Courtesy of GENERAL MOTORS CORP.

7. Separate the outer tie rod ball stud from the steering knuckle using J 42188 . Refer to Rack
and Pinion Outer Tie Rod End Replacement in Power Steering Systems.
8. Separate the lower ball joint stud from the steering knuckle using J 42188 . Refer to Lower
Control Arm Replacement.

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Fig. 25: Bearing Assembly, Steering Knuckle & Wheel Hub With Mounting Bolts
Courtesy of GENERAL MOTORS CORP.

9. Remove the wheel hub mounting bolts.

10. Remove the hub and bearing assembly from the steering knuckle.
Installation Procedure

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Fig. 26: Bearing Assembly, Steering Knuckle & Wheel Hub With Mounting Bolts
Courtesy of GENERAL MOTORS CORP.

1. Install the hub and bearing assembly into the steering knuckle.

NOTE: Refer to Fastener Notice in Cautions and Notices.

2. Install the wheel hub mounting bolts.

Tighten: Tighten the wheel hub mounting bolts to 130 N.m (96 lb ft).

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Fig. 27: Upper, Lower Control Arms With Components

Courtesy of GENERAL MOTORS CORP.

3. Install the lower control arm ball stud to the steering knuckle. Refer to Lower Control
Arm Replacement.
4. Remove the jackstand.
5. Install the steering linkage outer tie rod ball stud to the steering knuckle. Refer to Rack and
Pinion Outer Tie Rod End Replacement in Power Steering Systems.

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Fig. 28: View Of Rear Wheel Speed Sensor Harness Connector

Courtesy of GENERAL MOTORS CORP.

6. Connect the wheel speed sensor electrical connector.

7. Install the stabilizer shaft link to the lower control arm. Refer to Stabilizer Shaft Link
Replacement.
8. Install the brake rotor and caliper. Refer to Front Brake Rotor Replacement and Front
Brake Caliper Replacement (J56) or Front Brake Caliper Replacement (JL9-J55) in
Disc Brakes.
9. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in
Tires and Wheels.
10. Lower the vehicle.

STEERING KNUCKLE REPLACEMENT

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Tools Required

J 42188 Ball Joint Separator

Removal Procedure

Fig. 29: Stabilizer Shaft Link & Lower Control Arm

Courtesy of GENERAL MOTORS CORP.

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1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
Information.
2. Remove the brake caliper and rotor. Refer to Front Brake Rotor Replacement and Front
Brake Caliper Replacement (J56) or Front Brake Caliper Replacement (JL9-J55) in
Disc Brakes.

Fig. 30: Upper, Lower Control Arms With Components

Courtesy of GENERAL MOTORS CORP.

3. Remove the stabilizer shaft link from the lower control arm.

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Fig. 31: View Of Rear Wheel Speed Sensor Harness Connector

Courtesy of GENERAL MOTORS CORP.

4. Disconnect the wheel speed sensor electrical connector.

5. Support the lower control arm using a jackstand.
6. Separate the steering linkage outer tie rod ball stud from the steering knuckle using J
42188 . Refer to Rack and Pinion Outer Tie Rod End Replacement in Power Steering
Systems.
7. Separate and remove the upper control arm ball joint stud from the steering knuckle usingJ
42188 . Refer to Upper Control Arm Replacement.
8. Using J 42188 separate and remove the lower ball joint stud from the steering knuckle.
Refer to Lower Control Arm Replacement.
9. Remove the steering knuckle from the vehicle.
Installation Procedure
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Fig. 32: Upper, Lower Control Arms With Components

Courtesy of GENERAL MOTORS CORP.

1. Install steering knuckle to the upper control arm and the lower control arm. Refer to Upper
Control Arm Replacement and Lower Control Arm Replacement.
2. Remove the jackstand.
3. Install the steering linkage outer tie rod ball stud to the steering knuckle. Refer to Rack and
Pinion Outer Tie Rod End Replacement in Power Steering Systems.

NOTE: Use the correct fastener in the correct location. Replacement

fasteners must be the correct part number for that application.
Fasteners requiring replacement or fasteners requiring the use
of thread locking compound or sealant are identified in the
service procedure. Do not use paints, lubricants, or corrosion
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inhibitors on fasteners or fastener joint surfaces unless

specified. These coatings affect fastener torque and joint
clamping force and may damage the fastener. Use the correct
tightening sequence and specifications when installing
fasteners in order to avoid damage to parts and systems.

4. Install the stabilizer shaft link to the lower control arm.

Tighten: Tighten the stabilizer shaft link nut to 72 N.m (53 lb ft).

Fig. 33: View Of Rear Wheel Speed Sensor Harness Connector

Courtesy of GENERAL MOTORS CORP.

5. Connect the wheel speed sensor electrical connector.

6. Install the brake rotor and caliper. Refer to Front Brake Rotor Replacement and Front

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Brake Caliper Replacement (J56) or Front Brake Caliper Replacement (JL9-J55) in

Disc Brakes.
7. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in
Tires and Wheels.
8. Lower the vehicle.
9. Check the front wheel toe and adjust as necessary. Refer to Diagnostic Starting Point -
Disc Brakes Measuring Wheel Alignment in Wheel Alignment.

UPPER CONTROL ARM REPLACEMENT

Tools Required

J 42188 Ball Joint Separator

Removal Procedure

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Fig. 34: ESC Sensor Link

Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
Information.
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation
in Tires and Wheels.
3. Disconnect the electronic suspension control (ESC) sensor link.
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4. Support the lower control arm with a jackstand.

Fig. 35: Upper Ball Joint Stud & Upper Control Arm
Courtesy of GENERAL MOTORS CORP.

5. Loosen the ball joint stud nut but do not remove the nut.
6. Using tool J 42188 separate the upper ball joint stud from the upper control arm.
7. Remove tool J 42188 from the ball joint stud.

Remove the ball joint stud nut from the ball joint stud.

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Fig. 36: Upper Control Arm, Bolts & Shims

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The upper control arm shims will have an effect on the
camber and the caster. Make sure to use an equal thickness
of shims on both sides of each individual upper control arm
bushing.

8. Remove the upper control arm bolts and shims. Note the number and position of the shims
for installation purposes.
9. Remove the upper control arm from the vehicle.
Installation Procedure

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Fig. 37: Upper Control Arm, Bolts & Shims

Courtesy of GENERAL MOTORS CORP.

1. Install the upper control arm to the vehicle.

IMPORTANT: The upper control arm shims will have an effect on the
camber and the caster. Make sure to use an equal thickness
of shims on both sides of each individual upper control arm
bushing.

2. Install the upper control arm shims.

NOTE: Refer to Fastener Notice in Cautions and Notices.

3. Install the upper control arm mounting bolts to the upper control arm and frame rail.

Tighten: Tighten the upper control arm mounting bolts to 65 N.m (48 lb ft).

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Fig. 38: Upper Ball Joint Stud & Upper Control Arm
Courtesy of GENERAL MOTORS CORP.

4. Install the upper ball joint stud into the upper control arm. It will be necessary to use an
allen wrench to keep the ball joint stud from spinning while tightening the ball joint stud
nut.

Tighten: Tighten the upper control arm ball joint stud nut to 20 N.m (15 lb ft) plus 250
degrees.

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Fig. 39: ESC Sensor Link

Courtesy of GENERAL MOTORS CORP.

5. Connect the ESC sensor link.

6. Remove the jackstand.
7. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in
Tires and Wheels.

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8. Lower the vehicle.

LOWER CONTROL ARM REPLACEMENT

Tools Required

J 42188 Ball Joint Separator

J 33432-A Transverse Spring Remover
Removal Procedure

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Fig. 40: Leaf Spring Fixture

Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
Information.
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation
in Tires and Wheels.
3. Using the J 33432-A , remove the front transverse spring. Refer to Front Transverse
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Spring Replacement.

Fig. 41: View Of Rear Wheel Speed Sensor Harness Connector

Courtesy of GENERAL MOTORS CORP.

4. Disconnect the electrical connector from the wheel speed sensor.

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Fig. 42: Shock Absorber ESC Harness Connector

Courtesy of GENERAL MOTORS CORP.

5. Disconnect the electronic suspension control (ESC) electrical connector from the shock, if
equipped.

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Fig. 43: Lower Shock Absorber & Bolts

Courtesy of GENERAL MOTORS CORP.

6. Remove the shock absorber from the lower control arm.

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Fig. 44: Stabilizer Shaft Link & Lower Control Arm

Courtesy of GENERAL MOTORS CORP.

7. Remove the stabilizer shaft link from the lower control arm.

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Fig. 45: Lower Control Arm Ball Joint Stud & Steering Knuckle
Courtesy of GENERAL MOTORS CORP.

8. Loosen the ball joint stud nut but do not remove the nut.

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Fig. 46: J 42188, Outer Tie Rod & Stud Nut, Outer Tie Rod & Ball Stud
Courtesy of GENERAL MOTORS CORP.

9. Using J 42188 separate the lower ball joint stud from the steering knuckle.
10. Remove J 42188 and the ball joint stud nut (2).
11. Remove the ball joint stud from the steering knuckle.

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Fig. 47: Lower Control Arm, Crossmember & Components

Courtesy of GENERAL MOTORS CORP.

12. Mark the position of the cam bolts for orientation when installing.
13. Remove the cam bolts, washers, and nuts retaining the control arm to the crossmember.
14. Remove the lower control arm from the vehicle.
Installation Procedure

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Fig. 48: Lower Control Arm, Crossmember & Components

Courtesy of GENERAL MOTORS CORP.

1. Install the lower control arm to the vehicle.

2. Install the cam bolts, washers, and nuts retaining control arm to the crossmember.

Place the cam bolts at the position marked during disassembly.

Due to a required wheel alignment, tighten the cam bolts but do not set to final torque
specifications at this time.

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Fig. 49: Lower Control Arm Ball Joint Stud & Steering Knuckle
Courtesy of GENERAL MOTORS CORP.

3. Support the lower control arm with a jackstand.

4. Install the lower ball joint stud to the steering knuckle.

NOTE: Refer to Fastener Notice in Cautions and Notices.

5. Install the lower control arm ball joint stud nut.

It may be necessary to use an allen wrench to keep the ball joint stud from spinning while
tightening the ball joint stud nut.

Tighten: Tighten the lower control arm ball joint stud nut to 30 N.m (20 lb ft) plus 180
degrees.
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Fig. 50: Stabilizer Shaft Link & Lower Control Arm

Courtesy of GENERAL MOTORS CORP.

6. Install the stabilizer shaft link to the lower control arm.

Tighten: Tighten the stabilizer shaft link nut to 72 N.m (53 lb ft).

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Fig. 51: Leaf Spring Fixture

Courtesy of GENERAL MOTORS CORP.

7. Install the front transverse spring. Refer to Front Transverse Spring Replacement.
8. Remove the spring compressor tool J 33432-A .

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Fig. 52: Lower Shock Absorber & Bolts

Courtesy of GENERAL MOTORS CORP.

9. Connect the shock absorber to the lower control arm.

Tighten: Tighten the shock absorber lower mounting nuts to 28 N.m (21 lb ft).

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Fig. 53: Shock Absorber ESC Harness Connector

Courtesy of GENERAL MOTORS CORP.

10. Connect the ESC electrical connector to the shock, if equipped.

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Fig. 54: View Of Rear Wheel Speed Sensor Harness Connector

Courtesy of GENERAL MOTORS CORP.

11. Connect the electrical connector to the wheel speed sensor.

12. Remove the jackstands.
13. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in
Tires and Wheels.
14. Lower the vehicle.
15. Perform a front wheel alignment. Refer to Measuring Wheel Alignment in Wheel
Alignment.

Tighten: Tighten the lower control arm cam bolt nuts to 170 N.m (125 lb ft).

WHEEL STUD REPLACEMENT

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Tool Required

J 43631 Ball Joint Separator

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
Information.
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation
in Tires and Wheels.
3. Remove the front wheel hub/speed sensor assembly. Refer to Wheel Bearing/Hub
Replacement - Front.

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Fig. 55: Removing Wheel Stud From Axle Flange

Courtesy of GENERAL MOTORS CORP.

4. Install tool J 43631 onto the wheel hub and stud.

5. Turn the forcing screw in until the stud is pushed out of the wheel hub.
Installation Procedure

1. Place a new stud in the wheel hub.

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Fig. 56: Installing Wheel Stud

Courtesy of GENERAL MOTORS CORP.

2. Install some washers onto the wheel stud.

3. With the flat side of a wheel nut (2) against the washers, tighten the wheel nut until the
wheel stud head seats against the wheel hub flange.

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IMPORTANT: Make sure that the wheel stud is fully seated against the
wheel hub flange.

4. Remove the wheel nut and washers.

5. Install the wheel hub/speed sensor assembly into the steering knuckle. Refer to Wheel
Bearing/Hub Replacement - Front.
6. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in
Tires and Wheels.
7. Lower the vehicle.

SHOCK ABSORBER REPLACEMENT (W/F55)

Tools Required

J 33432-A Transverse Spring Compressor

J 43822 Shock Support Tool
Removal Procedure

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Fig. 57: Shock Absorber & ESC Harness Connector

Courtesy of GENERAL MOTORS CORP.

1. Disconnect the front shock ESC harness connector.

2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation .

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Fig. 58: Shock Absorber Lower Mounting Bolts & Nuts

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: The ESC connector seals to the upper shock shaft. If the
upper shock shaft is damaged, the shock will need
replacement.

4. Using only hand tools, remove the upper mounting nut, insulator retainer and insulator.
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5. Remove the shock absorber lower mounting bolts and nuts.

6. Using a pry bar, compress the shock absorber from the bottom upward.
7. While the shock is in the compressed position, install the J 43822 .
8. Remove the shock absorber from the vehicle.
9. Remove the J 43822 from the shock absorber.
10. Remove the insulator and insulator retainer from the shock absorber.
Installation Procedure

1. Install the J 43822 to the shock absorber.

2. Install the insulator and insulator retainer to the shock absorber.

Fig. 59: Shock Absorber & ESC Harness Connector

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Courtesy of GENERAL MOTORS CORP.

3. Position the shock absorber between the upper shock support and lower control arm.

NOTE: Refer to Fastener Notice .

4. Install the insulator, insulator retainer and nut to the upper shock shaft.

Tighten: Tighten the nut to 26 N.m (19 lb ft).

5. Remove the J 43822 from the shock absorber.

6. Using the J 33432-A , compress the coil spring.
7. Raise the lower control arm to the shock absorber lower mounting and install the bolts and
nuts.

Tighten: Tighten the nut to 28 N.m (21 lb ft).

8. Remove the J 33432-A from the coil spring.

9. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
10. Lower the vehicle.

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Fig. 60: Shock Absorber Lower Mounting Bolts & Nuts

Courtesy of GENERAL MOTORS CORP.

11. Connect the ESC harness connector. Check the connection by lightly pulling upwards on the
connector.

SHOCK ABSORBER REPLACEMENT (W/O F55)

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Tools Required

J 33432-A Transverse Spring Compressor

J 43822 Shock Support Tool
Removal Procedure

Fig. 61: Shock Absorber ESC Harness Connector

Courtesy of GENERAL MOTORS CORP.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General
Information.
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation
in Tires and Wheels.
3. Disconnect the electronic suspension control electrical connector from the shock, if
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equipped.
4. Remove the upper mounting nut, insulator retainer, and insulator.

Fig. 62: Lower Shock Absorber & Bolts

Courtesy of GENERAL MOTORS CORP.

5. Remove the shock absorber lower mounting bolts and nuts.

6. Remove the shock absorber from the upper shock tower and the vehicle.
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7. Remove the insulator and retainer from shock absorber.

8. For vehicles equipped with heavy duty shocks (FE3) perform the following steps.

IMPORTANT: During this procedure, use care not to scratch the

transverse spring.

1. Perform steps 1-4.

2. Using a pry bar compress the shock absorber from the bottom upward.
3. Install the J 43822 to the shock absorber while the shock is compressed.
4. Remove the shock absorber from the shock tower and the vehicle.
5. Remove J 43822 from the shock absorber.
Installation Procedure

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Fig. 63: Lower Shock Absorber & Bolts

Courtesy of GENERAL MOTORS CORP.

1. Install the retainer and insulator to the shock absorber.

2. Install the shock absorber to the upper shock tower.

NOTE: Use the correct fastener in the correct location. Replacement

fasteners must be the correct part number for that application.
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Fasteners requiring replacement or fasteners requiring the use

of thread locking compound or sealant are identified in the
service procedure. Do not use paints, lubricants, or corrosion
inhibitors on fasteners or fastener joint surfaces unless
specified. These coatings affect fastener torque and joint
clamping force and may damage the fastener. Use the correct
tightening sequence and specifications when installing
fasteners in order to avoid damage to parts and systems.

3. Install the upper insulator, retainer, and nut.

Tighten: Tighten the shock absorber upper mounting nut to 26 N.m (19 lb ft).

4. Install the shock absorber lower mounting bolts and nuts.

Tighten: Tighten the shock absorber lower mounting nuts to 28 N.m (21 lb ft).

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Fig. 64: Shock Absorber ESC Harness Connector

Courtesy of GENERAL MOTORS CORP.

5. Connect the electronic suspension control electrical connector to the shock, if equipped.
6. Remove J 33432-A from the spring.
7. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in
Tires and Wheels.
8. Lower the vehicle.
9. For vehicles equipped with heavy duty shocks (FE3) perform the following steps.
1. Install the J 43822 to the shock absorber.
2. Install the shock absorber into the vehicle.
3. Install the upper insulator, retainer, and nut.

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Tighten: Tighten the shock absorber upper mounting nut to 26 N.m (19 lb ft).

4. Remove J 43822 from the shock absorber.

5. Install J 33432-A to the spring and compress.
6. Raise the lower control arm and install the shock absorber lower mounting bolts and
nuts.

Tighten: Tighten the shock absorber lower mounting nuts to 28 N.m (21 lb ft).

7. Remove J 33432-A from the spring.

8. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation in Tires and Wheels.
9. Lower the vehicle.

SUSPENSION SHOCK/STRUT DISPOSAL

CAUTION: Gas charged shock absorbers contain high pressure gas. Do

not remove the snap ring from inside the top of the tube. If the
snap ring is removed, the contents of the shock absorber will
come out with extreme force which may result in personal
injury.

CAUTION: To prevent personal injury, wear safety glasses when

centerpunching and drilling the shock absorber. Use care not
to puncture the shock absorber tube with the centerpunch.

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Fig. 65: Drilling Hole In Shock Absorber At Centerpunched Locations

Courtesy of GENERAL MOTORS CORP.

1. Make an indentation 10 mm (0.4 in) from the bottom (4) of the tube (3) using a
centerpunch.
2. Clamp the shock absorber in a vise horizontally with the shock absorber rod (1) completely
extended.
3. Drill a hole in the shock absorber at the centerpunch (4) using a 5 mm (3/16 in) drill bit.
Gas or a gas/oil mixture will exhaust when the drill bit penetrates the shock absorber. Use
shop towels in order to contain the escaping oil.
4. Make an indentation in the middle (2) of the tube (3) with a centerpunch.
5. Drill a second hole in the shock absorber at the centerpunch (2) using a 5 mm (3/16 in) drill
bit. Oil will exhaust when the drill bit penetrates the shock absorber. Use shop towels in
order to contain the escaping oil.
6. Remove the shock absorber from the vise. Hold the shock absorber over a drain pan
horizontally with the holes down. Move the rod (1) in and out of the tube (3) to completely
drain the oil from the shock absorber.

DESCRIPTION AND OPERATION

FRONT SUSPENSION DESCRIPTION AND OPERATION

The front suspension uses a single lightweight fiberglass transverse spring mounted to the lower
control arms.

The upper control arms are made of high-strength forged aluminum. The lower control arms, the
crossmember and the steering knuckles are made of cast aluminum.

The hub and bearing assembly is a sealed unit. The hub and bearing assembly eliminates the need
for wheel bearing adjustment. The hub and bearing assembly requires no maintenance.

The high-strength tubular steel stabilizer shaft provides stability.

The shock absorbers attach at the upper end to the frame and attach at the lower control arm. The
shock absorber helps keep the wheel in contact with the road surface under most road conditions.
The shock absorber reduces crash-through at full jounce and rebound.

The standard gas shocks and the optional Electronic Suspension Control (ESC) shock absorbers
are gas charged to reduce aeration (foaming) of the shock fluid. Aeration of the shock fluid
results in unlimited damping control.
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SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS

Special Tools
Illustration Tool Number/ Description

J 33432-A
Leaf Spring Compressor

J 42188
Ball Joint Separator

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J-43631
Ball Joint Remover

J-43822
Shock Remover/Installer

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