GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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

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. 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 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 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. Important: 

       • DO NOT use any air tools to remove or install the guide pin bolts. Use hand tools ONLY.
       • Install an open end wrench to hold the caliper guide pin in line with the brake caliper while removing or installing the caliper guide pin bolt. DO NOT allow the open end wrench to come in contact with the brake caliper. Allowing the open end wrench to come in contact with the brake caliper will cause a pulsation when the brakes are applied.


    Object Number: 1873943  Size: SH
  7. Remove the lower brake caliper guide pin bolt (1).
  8. Hold the brake caliper guide pin stationary when removing the guide pin bolt.


    Object Number: 1873944  Size: SH
  9. Pivot the brake caliper (1) upward and support with heavy mechanics wire or equivalent.
  10. Place a block of wood or an old brake pad against the brake caliper pistons.
  11. Using a brake pad spreader tool or equivalent, fully seat the caliper pistons in the caliper bores.

  12. Object Number: 1873962  Size: SH
  13. Remove the inner brake pad (1) and the outer brake pad (2).
  14. Note the location of the brake pad wear sensor for correct installation.


    Object Number: 1873964  Size: SH
  15. Remove the upper and lower brake pad shims (1).
  16. If installing new brake pads, discard the shims.

Installation Procedure


    Object Number: 1873964  Size: SH
  1. Install the upper and lower brake pad shims (1).
  2. If installing new brake pads, install new shims.


    Object Number: 1873962  Size: SH
  3. Install the inner brake pad (1) and the outer brake pad (2).
  4. Note the location of the brake pad wear sensor for correct installation.

    Notice: Refer to Fastener Notice in the Preface section.

    Important: 

       • DO NOT use any air tools to remove or install the guide pin bolts. Use hand tools ONLY.
       • Install an open end wrench to hold the caliper guide pin in line with the brake caliper while removing or installing the caliper guide pin bolt. DO NOT allow the open end wrench to come in contact with the brake caliper. Allowing the open end wrench to come in contact with the brake caliper will cause a pulsation when the brakes are applied.


    Object Number: 1873943  Size: SH
  5. Pivot the brake caliper into position and install the lower brake caliper guide pin bolt (1).
  6. Hold the brake caliper guide pin stationary when installing the guide pin bolt.

    Tighten
    Tighten the bolt to 27 N·m (20 lb ft).

  7. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  8. Lower the vehicle.
  9. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of its travel distance.
  10. Slowly release the brake pedal.
  11. Wait 15 seconds, then repeat steps 6-7 until a firm brake pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
  12. Fill the master cylinder reservoir to the proper level. Refer to Master Cylinder Reservoir Filling .
  13. Burnish the pads and rotors. Refer to Brake Pad and Rotor Burnishing .