GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Savana 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Master Cylinder Replacement

Removal Procedure
  1. Apply the park brake and block the wheels.

    2. Object Number: 182659 Size: SH
  2. Disconnect the brake pipes from the brake 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.

  3. Plug the open brake pipe ends.

    4. Object Number: 161487 Size: SH
  4. Remove the master cylinder mounting nuts.
  5. Remove the master cylinder from the vehicle.
  6. Drain the master cylinder reservoir of all brake fluid.

Installation Procedure
  1. Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding .

    2. Object Number: 161488 Size: SH
  2. Install the master cylinder to the brake booster (hydraulic booster shown).

    3. 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 master cylinder mounting nuts.

    4. Tighten
    Tighten the master cylinder mounting nuts to 36 N·m (27 lb ft).


    Object Number: 182659 Size: SH
  4. Remove the plugs from the brake pipes.
  5. Connect the brake pipes to the brake master cylinder.

    6. Tighten
    Tighten the brake pipe fittings to 30 N·m (22 lb ft).

  6. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding .
  7. Release the park brake and remove the wheel blocks.