GM Service Manual Online
For 1990-2009 cars only

Rear Brake Caliper Bracket Replacement without J55

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

Removal Procedure


    Object Number: 178630  Size: SH

    Notice: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.

  1. Remove the brake caliper from the mounting bracket and support the brake caliper (2) with heavy mechanic's wire (1), or equivalent; do NOT disconnect the hydraulic brake flexible hose from the caliper. Refer to Rear Brake Caliper Replacement .

  2. Object Number: 680415  Size: SH
  3. Remove the brake pads (2) from the brake caliper bracket (3).
  4. Remove the brake pad retainers (1) from the brake caliper bracket (3).

  5. Object Number: 680323  Size: SH
  6. Remove the brake caliper bracket bolts (1).
  7. Remove the rear brake caliper bracket from the lower control arm.
  8. Use a wire brush to remove any rust and debris from the brake caliper bracket.
  9. Inspect the brake mounting and hardware. Refer to Rear Disc Brake Hardware Replacement .
  10. Inspect the brake caliper bracket.
  11. Replace the brake caliper bracket if cracked or damaged.

Installation Procedure

Important: The brake caliper bracket bolts threads and the threaded holes of the brake caliper bracket must be free of residue and debris prior to reapplication of threadlocker in order to ensure proper adhesion and fastener retention.

    • Prepare the bolts and the threaded holes for assembly:
      • 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.
    • 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.
    • Allow the threadlocker to cure approximately ten minutes before installation.

    Object Number: 680323  Size: SH
  1. Install the brake caliper bracket.
  2. 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 brake caliper bracket bolts (1).
  4. Tighten
    Tighten the rear brake caliper bracket bolts to 128 N·m (94 lb ft).

  5. Apply A thin coat of NIGLUBE® to the brake caliper pin bolts.

  6. Object Number: 680415  Size: SH
  7. Install the brake pad retainers (1) to the brake caliper bracket (3).
  8. Install the brake pads (2) to the brake caliper bracket (3).
  9. Install the brake caliper. Refer to Rear Brake Caliper Replacement .

Rear Brake Caliper Bracket Replacement J55

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

Removal Procedure

  1. Remove the brake caliper from the mounting bracket and support the brake caliper with heavy mechanic's wire, or equivalent; do NOT disconnect the hydraulic brake flexible hose from the caliper. Refer to Rear Brake Caliper Replacement .
  2. Remove the brake pads from the brake caliper bracket.
  3. Remove the brake pad retainers from the brake caliper bracket.
  4. Remove the brake caliper bracket bolts (1).
  5. Remove the brake caliper bracket from the backing plate.
  6. Use a wire brush to clean any debris or rust from the brake caliper bracket.

  7. Object Number: 369671  Size: SH
  8. Inspect the brake mounting and hardware. Refer to Brake Caliper Inspection .
  9. Inspect the brake caliper bracket for cracks or damage.
  10. Replace the brake caliper bracket if cracked or damaged.

Installation Procedure

Important: The brake caliper bracket bolts threads and the threaded holes of the brake caliper bracket must be free of residue and debris prior to reapplication of threadlocker in order to ensure proper adhesion and fastener retention.

    • Prepare the bolts and the threaded holes for assembly:
      • 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.
    • 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.
    • Allow the threadlocker to cure approximately 10 minutes before installation.

    Object Number: 369671  Size: SH
  1. Install the brake caliper bracket to the backing plate assembly.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the brake caliper bracket bolts.
  4. Tighten
    Tighten the brake caliper bracket bolts to 246 N·m (181 lb ft).

  5. Apply a thin coat of high temperature silicone lube to the brake caliper pin bolts.
  6. Install the brake pad retainers to the brake caliper bracket.
  7. Install the brake pads to the brake caliper bracket.
  8. Install the brake caliper. Refer to Rear Brake Caliper Replacement .