GM Service Manual Online
For 1990-2009 cars only

Shock Absorber Replacement with Coil Spring

Removal Procedure

Notice: The front shock absorbers of the vehicle are multifunctional. In addition to contributing to a smooth ride they also provide the only stop to the front suspension when fully extended. Therefore, when servicing the shock absorber, service replacement shock absorbers must be equivalent to original shock absorbers in both extended length and strength. Use of shocks not complying to original equipment or strength could result in suspension over-travel or shock breakage. Suspension over-travel may result in suspension component breakage.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

  2. Object Number: 160827  Size: SH
  3. Support the lower control arm with a jack stand.

  4. Object Number: 477707  Size: SH
  5. Remove the upper insulator (1).

  6. Object Number: 348381  Size: SH
  7. Remove the shock absorber mounting bolts at the lower control arm.
  8. Remove the shock absorber through the lower control arm from below.

Installation Procedure

  1. Install the shock absorber through the lower control arm from below. Insert the tennon through the mounting hole in the upper spring pocket.
  2. Align the shock absorber with the mounting holes in the lower control arm.
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 348381  Size: SH
  4. Install the shock absorber mounting bolts to the lower control arm.
  5. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).


    Object Number: 477707  Size: SH

    Important: The upper insulators are substantially larger that the lower insulators. The upper insulator (1) must be installed above the shock mounting bracket on the frame.

  6. Install the upper insulator to the shock absorber.
  7. Install the nut to the tennon end. Do not tighten the nut.
  8. Remove the safety stands.
  9. Lower the vehicle.
  10. Hold the tennon end with a wrench while torquing the nut.
  11. Tighten
    Tighten the nut to 20 N·m (15 lb ft).

  12. Dispose of the shock absorber. Refer to Shock Absorber Disposal .

Shock Absorber Replacement with Torsion Bar

Removal Procedure

Notice: The front shock absorbers of the vehicle are multifunctional. In addition to contributing to a smooth ride they also provide the only stop to the front suspension when fully extended. Therefore, when servicing the shock absorber, service replacement shock absorbers must be equivalent to original shock absorbers in both extended length and strength. Use of shocks not complying to original equipment or strength could result in suspension over-travel or shock breakage. Suspension over-travel may result in suspension component breakage.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

  2. Object Number: 160827  Size: SH
  3. Support the lower control arm with a jack stand.

  4. Object Number: 477707  Size: SH
  5. Remove the upper insulator (1).

  6. Object Number: 348386  Size: SH
  7. Remove the shock absorber mounting bolt at the lower control arm, the 15 series.
  8. The lower shock mounting bushing is serviceable by driving the bushing out with the appropriate tool.

  9. Object Number: 353965  Size: SH
  10. Remove the shock absorber mounting bolt (2) at the lower control arm, the 25 series.
  11. Remove the shock absorber.

Installation Procedure

  1. Install the shock absorber. Insert the stem through the hole in the shock bracket on the frame.
  2. Align the shock absorber with the mounting holes in the lower control arm, the 15 series.

  3. Object Number: 353965  Size: SH
  4. Align the shock absorber with the mounting holes in the lower control arm, the 25 series.
  5. Install the shock absorber through the bolt (2) to the lower control arm.
  6. Notice: Refer to Fastener Notice in the Preface section.

  7. Install the shock absorber through the bolt nut (3).
  8. Tighten
    Tighten the nut to 80 N·m (59 lb ft).


    Object Number: 477707  Size: SH

    Important: The upper insulators are substantially larger that the lower insulators. The upper insulator (1) must be installed above the shock mounting bracket on the frame.

  9. Install the upper insulator to the shock absorber.
  10. Install the nut to the tennon end. Do not tighten the nut.
  11. Remove the safety stands.
  12. Lower the vehicle.
  13. Hold the tennon end with a wrench while torquing the nut.
  14. Tighten
    Tighten the nut to 20 N·m (15 lb ft).

  15. Dispose of the shock absorber. Refer to Shock Absorber Disposal .