Brake Fluid Reservoir: Service and Repair

Master Cylinder Reservoir Replacement

Removal Procedure
Warning: Refer to Brake Fluid Irritant Warning Brake Fluid Irritant Warning.


1. Using a suitable tool, remove and properly discard the brake fluid from the master cylinder reservoir.
2. Clean the master cylinder reservoir and master cylinder assembly with denatured alcohol to remove any accumulated dirt and debris and allow to dry.
3. Disconnect the brake fluid level indicator switch electrical connector.




4. Carefully spread the 4 master cylinder reservoir locking legs and lift the master cylinder reservoir (1) upward.




5. Remove the master cylinder reservoir seals (1).

Installation Procedure

1. Lightly lubricate the master cylinder reservoir seals with GM approved brake fluid from a clean, sealed brake fluid container.




2. Install the master cylinder reservoir seals (1).





Note: Ensure the 4 locking legs of the master cylinder reservoir fully engage the master cylinder.

3. Install the master cylinder reservoir (1) to the master cylinder.
4. Connect the brake fluid level indicator switch electrical connector.
5. Fill the master cylinder reservoir. Refer to Master Cylinder Reservoir Filling Master Cylinder Reservoir Filling.