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. Using a suitable tool, remove the brake fluid from the brake master cylinder reservoir.
2. Discard the brake fluid into an approved container.
3. Disconnect the brake fluid level indicator switch electrical connector.
4. Remove the master cylinder reservoir bolts (1).



5. Carefully lift the master cylinder reservoir (1) straight upward and remove the reservoir from the master cylinder.



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

1. Lubricate the master cylinder reservoir seals (1) and the outer surface area of the reservoir-to-housing barrels with GM approved brake fluid from a clean, sealed brake fluid container.
2. If reinstalling the master cylinder reservoir, clean the reservoir with denatured alcohol, or equivalent and allow to dry.
3. Install the master cylinder reservoir seals to the master cylinder.

Ensure the master cylinder reservoir seals are fully seated in the master cylinder body.




4. Lubricate the master cylinder reservoir-to-master cylinder barrels with GM approved brake fluid from a clean, sealed brake fluid container.
5. Carefully press the master cylinder reservoir (1) straight downward and install the reservoir to the master cylinder.

Caution: Refer to Fastener Caution in the Preface section.




6. Install the master cylinder reservoir bolts (1) and tighten to  8 N·m (71 lb in).
7. Connect the brake fluid level indicator switch electrical connector.
8. Fill the master cylinder reservoir. Refer to Master Cylinder Reservoir Filling.