Brake Fluid Reservoir: Service and Repair

Master Cylinder Reservoir Replacement
Warning: Refer to Brake Fluid Irritant Warning Brake Fluid Irritant Warning.


Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution Vehicle Damage Warnings.

Removal Procedure




1. Disconnect the brake fluid level indicator switch electrical connector.
2. Remove and discard the brake fluid from the master cylinder reservoir.
3. Remove the master cylinder reservoir bolt (1).




4. Remove the reservoir (1) from the master cylinder.




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

Installation Procedure

1. Inspect the master cylinder reservoir for damage and replace, if necessary.
2. Clean the reservoir with denatured alcohol.
3. Dry the reservoir with filtered, non-lubricated compressed air.




4. Lubricate the seals and the reservoir bayonets with Delco Supreme 11(R), GM P/N 12377967 (Canadian P/N 992667) or equivalent DOT-3 brake fluid.
5. Install the reservoir seals (1) to the master cylinder.




6. Install the reservoir (1) to the master cylinder.





Caution: Refer to Fastener Caution Fastener Caution.

7. Install the master cylinder reservoir bolt (1).

Tighten the bolt to 8 Nm (71 lb in).

8. Connect the brake fluid level indicator switch electrical connector.
9. Fill the master cylinder reservoir. Refer to Master Cylinder Reservoir Filling Master Cylinder Reservoir Filling.