GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    Notice: Avoid spilling brake fluid onto painted surfaces, electrical connections, wiring, or cables. Brake fluid will damage painted surfaces and cause corrosion to electrical components. If any brake fluid comes in contact with painted surfaces, immediately flush the area with water. If any brake fluid comes in contact with electrical connections, wiring, or cables, use a clean shop cloth to wipe away the fluid.

  1. Apply the park brake.
  2. Disconnect the brake pipes from the master cylinder.
  3. Important: Install a rubber cap or plug to the exposed brake pipe fitting ends in order to prevent brake fluid loss and contamination.

  4. Plug the open brake pipe ends.

  5. Object Number: 360967  Size: SH
  6. Remove the master cylinder nuts.

  7. Object Number: 363525  Size: SH
  8. Remove the master cylinder (1) from the vehicle.
  9. Drain the master cylinder reservoir of all brake fluid.

Installation Procedure

  1. Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding .
  2. Ensure the retainer (3) and the wiring harness bracket (2) are properly seated on the hydraulic brake booster (4).

  3. Object Number: 363525  Size: SH
  4. Install the master cylinder (1).

  5. Object Number: 360967  Size: SH

    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.

  6. Install the master cylinder nuts.
  7. Tighten
    Tighten the nuts to 36 N·m (27 lb ft).

  8. Remove the rubber cap or plug from the exposed brake pipe fitting ends.
  9. Connect the brake pipes.
  10. Tighten
    Tighten the pipe fittings to 25 N·m (18 lb ft).

  11. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding .
  12. Release the park brake.