GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.


    Object Number: 177372  Size: SH
  1. Disconnect the electrical connector from the brake fluid level sensor.
  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. Remove master cylinder mounting nuts.
  6. Remove the master cylinder from the vehicle.
  7. Drain the master cylinder reservoir of all brake fluid.

Installation Procedure


    Object Number: 177372  Size: SH
  1. Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding .
  2. Install the master cylinder to the vacuum brake booster.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the master cylinder mounting nuts.
  5. Tighten
    Tighten the master cylinder mounting nuts to 33 N·m (24 lb ft).

  6. Remove the plugs from the brake pipes.
  7. Connect the brake pipes to the master cylinder.
  8. Tighten

        • With ABS tighten the brake pipe fittings at the master cylinder to 30 N·m (22 lb ft).
        • Without ABS tighten the front brake fittings to 27 N·m (20 lb ft).
        • Without ABS tighten the rear brake fittings to 25 N·m (18 lb ft).
  9. Connect the electrical connector to the brake fluid level sensor.
  10. Bleed the brake system. Refer to Hydraulic Brake System Bleeding .