GM Service Manual Online
For 1990-2009 cars only

Caution: Two different designs of the front brake rotors and front brake pads are used on this vehicle. Do NOT interchange first design and second design parts, or a loss of braking and personal injury could occur.

Caution: Refer to Brake Dust 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 the vehicle and suitably support. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

  6. Object Number: 105305  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: 493816  Size: SH
  11. Remove the bottom brake caliper pin bolt (1).
  12. 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.

  13. Pivot the brake caliper body upward and secure out of the way with heavy mechanic's wire or equivalent. Do NOT disconnect the hydraulic brake flexible hose from the caliper.

  14. Object Number: 728143  Size: SH
  15. Install a large C-clamp (1) over the body of the brake caliper (3) with the C-clamp ends against the rear of the caliper body and against an old inner brake pad or a wood block (2) installed against the caliper piston.
  16. Tighten the C-clamp (1) until the caliper piston is compressed completely into the caliper bore.
  17. Remove the C-clamp (1) and the old brake pad or wood block (2) from the caliper (3).

  18. Object Number: 493818  Size: SH
  19. Remove the inboard and outboard brake pads from the brake caliper bracket.

  20. Object Number: 142015  Size: SH
  21. Remove and inspect the brake pad retainers.

Installation Procedure

  1. Inspect the caliper bolt suspension boots for cuts, tears, or deterioration. If damaged, replace the pin boots. Refer to Front Disc Brake Hardware Replacement .
  2. Inspect the caliper pin bolts for damage or corrosion. Replace if damaged or corroded. Do not attempt to clean away corrosion. Corrosion is typically caused by damaged pin boots. Refer to Front Disc Brake Hardware Replacement .
  3. Inspect the caliper piston boot for deterioration, replace if damaged. Refer to Front Brake Caliper Overhaul .
  4. Lubricate the front brake caliper pin bolts with a thin coat of NIGLUBE® grease .

  5. Object Number: 142015  Size: SH
  6. Install the brake pad retainers into the brake caliper bracket.

  7. Object Number: 493818  Size: SH
  8. Install both brake pads into the brake caliper bracket.

  9. Object Number: 105287  Size: SH
  10. Pivot the brake caliper down over the brake pads and into the brake caliper bracket.
  11. 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.


    Object Number: 493816  Size: SH
  12. Insert the lower brake caliper pin bolt (1).
  13. Tighten
    Tighten the brake caliper pin bolt to 85 N·m (63 lb ft).

  14. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  15. Lower the vehicle.
  16. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of its travel distance.
  17. Slowly release the brake pedal.
  18. Wait 15 seconds, then repeat steps 11-12 until a firm brake pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
  19. Fill the brake master cylinder reservoir to the proper level. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes.
  20. Burnish the pads and rotors. Refer to Brake Pad and Rotor Burnishing .