GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Blazer - 4WD - RHD 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Master Cylinder Reservoir Replacement

Removal Procedure
  1. Remove the brake master cylinder. Refer to Master Cylinder Replacement .
  2. Secure the brake master cylinder in a vise. DO NOT clamp the brake master cylinder body, secure only at the flange.

    3. Object Number: 176838 Size: SH
  3. Carefully remove the brake master reservoir retaining pins.
  4. Remove the brake master cylinder reservoir body by pulling the body straight up and away from the cylinder body.

    5. Object Number: 230993 Size: SH
  5. Remove the seals from the brake master cylinder.

Installation Procedure

    Object Number: 230993 Size: SH
  1. Inspect the reservoir for cracks or deformation. Replace the reservoir if necessary.
  2. Clean the reservoir with clean denatured alcohol.
  3. Dry the reservoir with non-lubricated compressed air.
  4. Lubricate the new seals and 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. Object Number: 176839 Size: SH
  6. Install the reservoir to the master cylinder body. Use your hand in order to press the reservoir straight down into the body.

    7. Object Number: 176838 Size: SH
  7. Carefully install the brake master cylinder reservoir retaining pins.
  8. Remove the brake master cylinder from the vise.
  9. Install the master cylinder. Refer to Master Cylinder Replacement .