GM Service Manual Online
For 1990-2009 cars only

Shock Absorber Replacement W/F45

Removal Procedure


    Object Number: 105016  Size: SH
  1. Pull the trunk trim back to gain access to the upper shock. Refer to Rear Compartment Side Trim Replacement - Left Side or Rear Compartment Side Trim Replacement - Right Side in Body Rear End.
  2. Remove upper shock dust cover.
  3. Remove shock absorber upper retaining nuts and reinforcement from the shock absorber.
  4. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Remove the wheel and tire. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

  6. Object Number: 472979  Size: SH
  7. Disconnect the air tube from the shock.
  8. Disconnect the road sensing suspension harness connector from the shock absorber.
  9. Remove the shock absorber wiring from the lower control arm.
  10. Remove the shock absorber mounting bolts from the lower control arm.

  11. Object Number: 337438  Size: SH
  12. Remove the shock absorber from the vehicle

Installation Procedure


    Object Number: 337438  Size: SH
  1. Install the shock absorber to the vehicle.

  2. Object Number: 472979  Size: SH

    Notice: 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 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 shock absorber lower retaining bolts.
  4. Tighten
    Tighten the retaining bolts to 25 N·m (18 lb ft).

  5. Route the wiring harness along the inboard side of the lower control arm.
  6. Connect the shock absorber electrical connector.
  7. Connect the air tube to shock absorber.

  8. Object Number: 105016  Size: SH
  9. Install the upper shock absorber into the body.
  10. Install the upper shock absorber reinforcement and retaining nuts.
  11. Tighten
    Tighten the shock absorber upper retaining nuts to 25 N·m (18 lb ft).

  12. Install the shock absorber cover.
  13. Position the trunk trim into the proper location. Refer to Rear Compartment Side Trim Replacement - Left Side or Rear Compartment Side Trim Replacement - Right Side in Body Rear End.
  14. Partially lower the vehicle onto the tires.
  15. Important: The automatic level control system must have residual pressure in the system before driving the vehicle.

  16. To add residual pressure to the automatic level control system, use the following procedure:
  17. 11.1. Turn ON the Ignition, with the engine OFF in order to activate the ALC system.
    11.2. After 45 seconds, turn OFF the ignition.
  18. Lower the vehicle

Shock Absorber Replacement W/F55

Removal Procedure


    Object Number: 821438  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the wheel and tire. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  3. Support the lower control arm.
  4. Disconnect the air tube from the shock absorber.
  5. Remove the 2 bolts (3) securing the shock absorber (1) to the control arm.

  6. Object Number: 821440  Size: SH
  7. Pull the trunk trim back to gain access to the upper shock. Refer to Rear Compartment Side Trim Replacement - Left Side or Rear Compartment Side Trim Replacement - Right Side in Body Rear End.
  8. Disconnect the road sensing suspension harness connector from the shock absorber (3).
  9. Remove the upper shock absorber retaining nuts (2) and remove the shock (1) from the vehicle.

Installation Procedure


    Object Number: 821440  Size: SH

    Notice: 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 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.

  1. Position the shock on the vehicle and install the upper shock absorber retaining nuts (2).
  2. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).

  3. Connect the road sensing suspension harness connector to the shock absorber (3).
  4. Position the trunk trim in the proper location. Refer to Rear Compartment Side Trim Replacement - Left Side or Rear Compartment Side Trim Replacement - Right Side in Body Rear End.

  5. Object Number: 821438  Size: SH
  6. Install the lower shock bolts (3).
  7. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).

  8. Connect the air tube to the shock.
  9. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  10. Partially lower the vehicle onto the tires.
  11. Important: The automatic level control system must have residual pressure in the system before driving the vehicle.

  12. To add residual pressure to the automatic level control system, use the following procedure:
  13. 8.1. Turn ON the Ignition, with the engine OFF in order to activate the ALC system.
    8.2. After 45 seconds, turn OFF the ignition.
  14. Lower the vehicle.