Notice: When filling the master cylinder, use only Delco Supreme 11, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT 3 brake fluid. Do not use a container which has been used for petroleum based fluids, or a container which is wet with water. Petroleum based fluids will cause swelling and distortion of rubber parts in the hydraulic brake system, and water will mix with brake fluid, lowering the boiling point. Keep all fluid containers capped to prevent contamination.

1. Thoroughly clean the master cylinder reservoir cover before removal to prevent dirt from entering the reservoir.
2. Remove the brake master cylinder cover and diaphragm.
3. Add brake fluid to the reservoir to a level between the minimum mark and the the top if the oval level indicator. Use the correct fluid. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.