GM Service Manual Online
For 1990-2009 cars only

Rear Suspension Support Crossmember Replacement All Wheel Drive

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
  3. Remove the muffler. Refer to Exhaust Muffler Replacement.

  4. Object Number: 1848083  Size: SH

    Note: The following step is to ensure that the wheel drive shaft assembly does not rotate while the nut is being removed.

  5. Insert a brass drift or punch in the brake rotor so that the brass drift or punch rest against the brake caliper mounting bracket.
  6. Using the breaker bar and socket, loosen the wheel drive shaft nut.

  7. Object Number: 1848075  Size: SH

    Note: DO NOT re-use the wheel drive shaft nut, discard and use NEW.

  8. Remove the wheel drive shaft nut.

  9. Object Number: 1854043  Size: SH
  10. Remove the rear brake caliper bracket bolts.
  11. Secure the rear brake caliper and bracket assemblies to the vehicle underbody.

  12. Object Number: 1854045  Size: SH
  13. Remove the rear wheel bearings, axles, and differential assembly. Refer to Differential Replacement.

  14. Object Number: 1854067  Size: SH
  15. Remove the park brake cables from the park brake cable equalizer and park brake cable bracket. Refer to Park Brake Cable Equalizer Replacement.

  16. Object Number: 1854061  Size: SH
  17. Disconnect the right park brake cable from the brake backing plate.

  18. Object Number: 1854046  Size: SH
  19. Remove both the rear brake backing plates.

  20. Object Number: 1854065  Size: SH
  21. Remove the lower bolts from the rear shock absorbers. Refer to Shock Absorber Replacement.

  22. Object Number: 1854070  Size: SH
  23. Remove the rear suspension crossmember wire harness retainers from the vehicle underbody.
  24. Disconnect the rear suspension crossmember wire harness from the vehicle body wire harness.

  25. Object Number: 1854047  Size: SH
  26. Support the rear suspension crossmember with a suitable stand.
  27. Remove the four bolts securing the rear suspension crossmember to vehicle.
  28. With the aid of an assistant, carefully lower the rear suspension crossmember or raise the vehicle away from the rear suspension crossmember.

  29. Object Number: 1854049  Size: SH
  30. Remove the jounce bumpers and springs from the rear suspension crossmember.

  31. Object Number: 1854051  Size: SH
  32. Release the wire harness retainers from the rear suspension crossmember.
  33. Remove the wire harness from the rear suspension crossmember.

  34. Object Number: 1854053  Size: SH
  35. Remove the right park brake cable retaining bolts from the rear suspension crossmember.
  36. Remove the right park brake cable from the rear suspension crossmember.

  37. Object Number: 1854056  Size: SH
  38. Remove the remaining suspension components from the rear suspension crossmember:
  39. • Stabilizer shaft insulator brackets--Refer to Stabilizer Shaft Insulator Replacement.
    • Upper control arm--Refer to Upper Control Arm Replacement.
    • Adjustment link--Refer to Adjust Link Replacement.
    • Lower control arm--Refer to Lower Control Arm Replacement.

Installation Procedure


    Object Number: 1854056  Size: SH
  1. Install the following suspension components to the rear suspension crossmember:
  2. • Lower control arm--Refer to Lower Control Arm Replacement.
    • Adjustment link--Refer to Adjust Link Replacement.
    • Upper control arm--Refer to Upper Control Arm Replacement.
    • Stabilizer shaft insulator brackets--Refer to Stabilizer Shaft Insulator Replacement.

    Object Number: 1854053  Size: SH
  3. Install the right park brake cable to the rear suspension crossmember.
  4. Caution: Refer to Fastener Caution in the Preface section.

  5. Install the right park brake cable retaining bolts to the rear suspension crossmember.
  6. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1854051  Size: SH
  7. Install the wire harness to the rear suspension crossmember.
  8. Attach the wire harness retainers to the rear suspension crossmember.

  9. Object Number: 1854049  Size: SH
  10. Install the jounce bumpers and springs to the rear suspension crossmember. Refer to Rear Spring, Insulator, and Jounce Bumper Replacement for proper spring installation.

  11. Object Number: 1854047  Size: SH
  12. With the rear suspension crossmember mounted on a suitable stand and with the aid of an assistant, carefully lower the vehicle or raise the rear suspension crossmember into location on the vehicle.
  13. Install the four bolts securing the rear suspension crossmember to vehicle.
  14. Tighten
    Tighten the bolts to 170 N·m (125 lb ft).


    Object Number: 1854070  Size: SH
  15. Connect the rear suspension crossmember wire harness to the vehicle body wire harness.
  16. Install the rear suspension crossmember wire harness retainers to the vehicle underbody.

  17. Object Number: 1854065  Size: SH
  18. Install the lower bolts to the rear shock absorbers. Refer to Shock Absorber Replacement.
  19. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).


    Object Number: 1854046  Size: SH
  20. Install both the rear brake backing plates.

  21. Object Number: 1854061  Size: SH
  22. Connect the right park brake cable to the brake backing plate.

  23. Object Number: 1854067  Size: SH
  24. Install the park brake cables to the park brake cable equalizer and park brake cable bracket. Refer to Park Brake Cable Equalizer Replacement.

  25. Object Number: 1854045  Size: SH
  26. Install the rear differential assembly, axles, and wheel bearings. Refer to Differential Replacement.

  27. Object Number: 1854043  Size: SH
  28. Install the rear brake caliper and bracket assemblies to the rear knuckles.
  29. Install the rear brake caliper bracket bolts.
  30. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

    Note: DO NOT re-use the wheel drive shaft nut, discard and use NEW.


    Object Number: 1848075  Size: SH
  31. Install the wheel drive shaft nut.

  32. Object Number: 1848083  Size: SH

    Note: The following step is to ensure that the wheel drive shaft assembly does not rotate while the nut is being installed.

  33. Insert a brass drift or punch in the brake rotor so that the brass drift or punch rest against the brake caliper mounting bracket.
  34. Using a torque wrench and socket, tighten the new wheel drive shaft nut.
  35. Tighten
    Tighten the nut to 260 N·m (192 lb ft).

  36. Install the muffler. Refer to Exhaust Muffler Replacement.
  37. Install the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
  38. Lower the vehicle.

Rear Suspension Support Crossmember Replacement Front Wheel Drive

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
  3. Remove the muffler. Exhaust Muffler Replacement.

  4. Object Number: 1854044  Size: SH
  5. Remove the rear brake caliper bracket bolts.
  6. Secure the rear brake caliper and bracket assemblies to the vehicle underbody.

  7. Object Number: 1854067  Size: SH
  8. Remove the park brake cables from the park brake cable equalizer and park brake cable bracket. Refer to Park Brake Cable Equalizer Replacement.

  9. Object Number: 1854065  Size: SH
  10. Remove the lower bolts from the rear shock absorbers. Refer to Shock Absorber Replacement.

  11. Object Number: 1854070  Size: SH
  12. Remove the rear suspension crossmember wire harness retainers from the vehicle underbody.
  13. Disconnect the rear suspension crossmember wire harness from the vehicle body wire harness.

  14. Object Number: 1854048  Size: SH
  15. Support the rear suspension crossmember with a suitable stand.
  16. Remove the four bolts securing the rear suspension crossmember to vehicle.
  17. With the aid of an assistant, carefully lower the rear suspension crossmember or raise the vehicle away from the rear suspension crossmember.

  18. Object Number: 1854050  Size: SH
  19. Remove the jounce bumpers and springs from the rear suspension crossmember.

  20. Object Number: 1854052  Size: SH
  21. Release the wire harness retainers from the rear suspension crossmember.
  22. Disconnect the wire harness from the wheel speed sensors.
  23. Remove the wire harness from the rear suspension crossmember.

  24. Object Number: 1854071  Size: SH
  25. Release the wheel speed wire harness retainers from the rear suspension crossmember.

  26. Object Number: 1854074  Size: SH
  27. Remove the right park brake cable retaining bolts from the rear suspension crossmember.
  28. Remove the right park brake cable from the rear suspension crossmember.

  29. Object Number: 1854058  Size: SH
  30. Remove the remaining suspension components from the rear suspension crossmember:
  31. • Stabilizer shaft insulator brackets--Refer to Stabilizer Shaft Insulator Replacement.
    • Upper control arm--Refer to Upper Control Arm Replacement.
    • Adjustment link--Refer to Adjust Link Replacement.
    • Lower control arm--Refer to Lower Control Arm Replacement.

Installation Procedure


    Object Number: 1854058  Size: SH
  1. Install the following suspension components to the rear suspension crossmember:
  2. • Lower control arm--Refer to Lower Control Arm Replacement.
    • Adjustment link--Refer to Adjust Link Replacement.
    • Upper control arm--Refer to Upper Control Arm Replacement.
    • Stabilizer shaft insulator brackets--Refer to Stabilizer Shaft Insulator Replacement.

    Object Number: 1854074  Size: SH
  3. Install the right park brake cable to the rear suspension crossmember.
  4. Caution: Refer to Fastener Caution in the Preface section.

  5. Install the right park brake cable retaining bolts to the rear suspension crossmember.
  6. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1854071  Size: SH
  7. Install the wheel speed wire harness retainers to the rear suspension crossmember.

  8. Object Number: 1854052  Size: SH
  9. Install the wire harness to the rear suspension crossmember.
  10. Attach the wire harness retainers to the rear suspension crossmember.
  11. Connect the wire harness to the wheel speed sensors.

  12. Object Number: 1854050  Size: SH
  13. Install the jounce bumpers and springs to the rear suspension crossmember. Refer to Rear Spring, Insulator, and Jounce Bumper Replacement for proper spring installation.

  14. Object Number: 1854048  Size: SH
  15. With the rear suspension crossmember mounted on a suitable stand and with the aid of an assistant, carefully lower the vehicle or raise the rear suspension crossmember into location on the vehicle.
  16. Install the four bolts securing the rear suspension crossmember to vehicle.
  17. Tighten
    Tighten the bolts to 170 N·m (125 lb ft).


    Object Number: 1854070  Size: SH
  18. Connect the rear suspension crossmember wire harness to the vehicle body wire harness.
  19. Install the rear suspension crossmember wire harness retainers to the vehicle underbody.

  20. Object Number: 1854065  Size: SH
  21. Install the lower bolts to the rear shock absorbers. Refer to Shock Absorber Replacement.
  22. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).


    Object Number: 1854067  Size: SH
  23. Install the park brake cables to the park brake cable equalizer and park brake cable bracket. Refer to Park Brake Cable Equalizer Replacement.

  24. Object Number: 1854044  Size: SH
  25. Install the rear brake caliper and bracket assemblies to the rear knuckles.
  26. Install the rear brake caliper bracket bolts.
  27. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

  28. Install the muffler. Exhaust Muffler Replacement.
  29. Install the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.
  30. Lower the vehicle.