GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove two-thirds of the brake fluid from the master cylinder.
  2. Raise the vehicle and suitably support. Refer to Raising and Supporting the Vehicle in General Information.
  3. Mark the relationship of the wheel to the axle flange.
  4. Remove the wheel and the tire.
  5. Re-install two wheel nuts to retain the rotor.

  6. Object Number: 142260  Size: SH
  7. If the caliper is to be removed for unit repair, remove the bolt attaching inlet fitting (1), and plug the opening in the caliper and/or pipe to prevent fluid loss and contamination.

  8. Object Number: 142234  Size: SH
  9. Push the piston into the caliper bore to provide clearance between linings and rotor.
  10. • Install a large C-clamp over the top of the caliper housing and against the back of the outboard shoe.
    • Slowly tighten the C-clamp until the piston is pushed into the caliper bore far enough to slide the caliper off the rotor.

    Object Number: 142240  Size: SH
  11. Remove the caliper mounting bolts (1) and sleeves.

  12. Object Number: 142244  Size: SH
  13. Remove the caliper. If only the shoes and linings are being replaced, suspend the caliper (2) with a wire hook (1) from the strut.
  14. Inspect the mounting bolts and sleeves for corrosion.
  15. Inspect the bushings for cuts and nicks.
  16. If damage is found use new parts when installing the caliper.
  17. Do not attempt to polish away corrosion.

Installation Procedure

Important: Mounting bolts and sleeves should slide through bushings with only hand pressure applied. If greater force is required, or mechanical assistance is needed, complete the following steps:

  1. Remove the bolts and sleeves along the bushings.
  2. Inspect the mounting bores for corrosion. If the bore shows signs of corrosion, remove the corrosion by using a 1-inch wheel cylinder honing brush.
  3. Clean the bores with clean, denatured alcohol.
  4. Install bushings and lubricate. Refer to Brake Caliper Overhaul .


    Object Number: 142246  Size: SH
  1. Liberally coat ID of bushings with silicone grease.
  2. Install the caliper.
  3. Install the mounting bolts and sleeves.
  4. 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.

  5. Install the inlet fitting, if removed.
  6. Tighten

        • Tighten the mounting bolts to 51 N·m (38 lb ft)
        • Tighten the Inlet fitting to 45 N·m (33 lb ft).
  7. Install the wheel and the tire, aligning the previous mark.
  8. • Install the wheel nuts securing the wheel to the hub.
    • Lower the vehicle.
    • Torque the wheel nuts per specification in Tires and Wheels.

    Tighten
    Tighten the wheel nuts to 140 N·m (100 lb ft).

  9. Fill the master cylinder to the proper level with clean brake fluid.
  10. • Bleed the caliper if the inlet fitting was removed.
    • Recheck the fluid level.