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.

  1. Disconnect the brake fluid level indicator switch electrical connector and separate from brake fluid reservoir.

  2. Object Number: 2027728  Size: SH
  3. Disconnect the master cylinder secondary brake pipe fitting (1).
  4. Cap the brake pipe fitting and plug the master cylinder outlet port to prevent brake fluid loss and contamination.


    Object Number: 2027729  Size: SH
  5. Disconnect the master cylinder primary brake pipe fitting.
  6. Cap the brake pipe fitting and plug the master cylinder outlet port to prevent brake fluid loss and contamination.


    Object Number: 2027733  Size: SH
  7. Remove master cylinder nuts (1).
  8. Remove master cylinder with brake fluid reservoir.
  9. Inspect the master cylinder to vacuum brake booster seal for damage and replace, if necessary.
  10. Remove the master cylinder reservoir, if necessary. Refer to Master Cylinder Reservoir Replacement.

Installation Procedure

  1. Install the brake fluid reservoir to master cylinder. Refer to Master Cylinder Reservoir Replacement.
  2. Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding.
  3. Ensure the master cylinder to vacuum brake booster seal is properly seated on the master cylinder barrel.
  4. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 2027733  Size: SH
  5. Install master cylinder nuts (1) and tighten to  20 N·m (15 lb ft).
  6. Disconnect the brake fluid level indicator switch electrical connector and separate from brake fluid reservoir.

  7. Object Number: 2027729  Size: SH
  8. Connect the master cylinder primary brake pipe fitting (1) and tighten to  Xx N·m (xx lb ft).

  9. Object Number: 2027728  Size: SH
  10. Connect the master cylinder primary brake pipe fitting and tighten to  Xx N·m (xx lb ft).
  11. Connect the brake fluid level indicator switch electrical connector.
  12. Bleed the hydraulic brake system. Refer to  Hydraulic Brake System Bleeding.