GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 176836  Size: SH
  1. Apply the park brake and block the wheels.
  2. Disconnect the electrical connector from the brake fluid level sensor.
  3. Remove the master cylinder. Refer to Master Cylinder Replacement .
  4. Drain the master cylinder reservoir.
  5. Secure the master cylinder in a vise. Do not clamp the master cylinder body, secure only at the flange.
  6. Remove the brake fluid level sensor by carefully depressing the retaining tabs and pushing the sensor through the reservoir.

  7. Object Number: 363760  Size: SH
  8. Carefully remove the reservoir retaining pins.

  9. Object Number: 363761  Size: SH
  10. Remove the reservoir from the master cylinder by pulling the reservoir straight up and away from the cylinder.
  11. Remove the seals from the master cylinder.

Installation Procedure


    Object Number: 363761  Size: SH
  1. Inspect the reservoir for cracks or deformation. If found, replace the reservoir.
  2. Clean the reservoir with denatured alcohol, or equivalent.
  3. Dry the reservoir with non-lubricated, filtered air.
  4. Lubricate the new seals and the outer surface area of the reservoir-to-housing barrels with Delco Supreme 11® (GM P/N 12377967) or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
  5. Install the lubricated seals, make sure they are fully seated.
  6. Install the reservoir to the master cylinder by pressing the reservoir straight down on the master cylinder until the pin holes are aligned.

  7. Object Number: 363760  Size: SH
  8. Carefully install the reservoir retaining pins to secure the reservoir.
  9. Place the brake fluid level sensor into the reservoir, press into place to secure the sensor retaining tabs.
  10. Remove the master cylinder from the vice.
  11. Install the master cylinder. Refer to Master Cylinder Replacement .
  12. Connect the electrical connector to the brake fluid level sensor.
  13. Release the park brake.
  14. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding .