GM Service Manual Online
For 1990-2009 cars only

Warning: Refer to Brake Fluid Irritant Warning in the Preface section.

Warning: Refer to Brake Dust Warning in the Preface section.

Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution in the Preface section.

Removal Procedure

  1. Inspect the fluid level in the brake master cylinder reservoir.
  2. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, no brake fluid needs to be removed from the reservoir before proceeding.
  3. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, remove brake fluid to the midway point before proceeding.
  4. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
  5. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.

  6. Object Number: 808143  Size: SH
  7. Install a large C-clamp over the body of the brake caliper with the C-clamp ends against the rear of the caliper body and against the outer brake pad.
  8. Tighten the C-clamp until the caliper piston is compressed into the caliper bore enough to allow the caliper to slide past the brake rotor.
  9. Remove the C-clamp from the caliper.

  10. Object Number: 63948  Size: SH
  11. Remove the brake hose to caliper bolt attaching the brake hose to the brake caliper.
  12. Remove the brake hose from the brake caliper.
  13. Remove and discard the two copper brake hose gaskets. These gaskets may be stuck to the brake caliper and/or the brake hose end.
  14. Plug the opening in the brake caliper and the brake hose to prevent fluid loss and contamination.

  15. Object Number: 63989  Size: SH
  16. Remove the brake caliper pin bolts.
  17. Remove the brake caliper from the brake caliper bracket.

Installation Procedure

  1. Inspect the caliper slide boots for cuts, tears, or deterioration. If damaged, replace the slides and boots. Refer to Rear Disc Brake Hardware Replacement.

  2. Object Number: 63989  Size: SH
  3. Install the brake caliper to the brake caliper bracket.
  4. Note: If reusing the brake caliper pin bolts the threads of the caliper pin bolts and the threads of the caliper bracket mounting holes must be free of residue and debris prior to application of threadlocker in order to ensure proper adhesion and fastener retention.

  5. Prepare the bolts and the threaded holes for assembly:
  6. • Thoroughly clean the residue from the bolt threads by using denatured alcohol or equivalent and allow to dry.
    • Thoroughly clean the residue from the threaded holes by using denatured alcohol or equivalent and allow to dry.
  7. Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488), or equivalent to two-thirds of the threaded length of the lower caliper bracket bolts. Ensure that there are no gaps in the threadlocker along the length of the filled area of the bolts.
  8. Allow the threadlocker to cure approximately ten minutes before installation.
  9. Apply a thin coat of high temperature silicone brake lubricant to the brake caliper pin bolts.
  10. Caution: Refer to Fastener Caution in the Preface section.

  11. Install the brake caliper pin bolts.
  12. Tighten
    Tighten the brake caliper pin bolts to 60 N·m (44 lb ft).


    Object Number: 63948  Size: SH
  13. Remove the plug from the brake caliper opening and the brake hose.
  14. Note: Install NEW copper brake hose gaskets.

  15. Assemble the NEW copper brake hose gaskets, and the brake caliper bolt to the brake hose.
  16. Install the brake hose and the brake caliper bolt to the brake caliper.
  17. Tighten
    Tighten the brake caliper bolt to 50 N·m (37 lb ft).

  18. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding.
  19. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of its travel distance.
  20. Slowly release the brake pedal.
  21. Wait 15 seconds, then repeat steps 12 and  13 until a firm brake pedal apply is obtained; this will properly seat the brake caliper pistons and brake pads.
  22. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation.
  23. Lower the vehicle.