GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

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

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


    Object Number: 931316  Size: SH
  1. Remove the underhood electrical center bracket. Refer to Underhood Electrical Center or Junction Block Bracket Replacement.
  2. Disconnect the electrical connector from the brake fluid level indicator switch.

  3. Object Number: 931327  Size: SH
  4. Disconnect the brake pipes from the master cylinder.
  5. Note: Install a rubber cap or plug to the exposed brake pipe fitting ends in order to prevent brake fluid loss and contamination.

  6. Plug the open brake pipe ends.

  7. Object Number: 926593  Size: SH
  8. Remove master cylinder mounting nuts.
  9. Remove the master cylinder from the vehicle.
  10. Drain the master cylinder reservoir of all brake fluid.

Installation Procedure


    Object Number: 926593  Size: SH
  1. Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding.
  2. Install the master cylinder to the brake booster.
  3. Caution: Refer to Fastener Caution in the Preface section.

  4. Install the master cylinder mounting nuts and tighten to 25 N·m (18 lb ft).

  5. Object Number: 931327  Size: SH
  6. Remove the plugs from the brake pipes.
  7. Connect the brake pipes to the master cylinder.
  8. Tighten the brake pipe fittings at the master cylinder to 18 N·m (13 lb ft).


    Object Number: 931316  Size: SH
  9. Connect the electrical connector to the brake fluid level indicator switch.
  10. Install the underhood electrical center bracket. Refer to Underhood Electrical Center or Junction Block Bracket Replacement.
  11. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding.