Removal Procedure
- Remove the electrical connector (1) from the fluid level sensor.
- Drain the brake fluid from the master cylinder reservoir.
- Tap back the pins until clear of the master cylinder reservoir. Be careful not to damage the master cylinder reservoir or master cylinder.
- Remove the master cylinder reservoir.
- Remove the seals.
- Inspect the master cylinder reservoir for cracks or deformities. If found, replace the master cylinder reservoir.
- Clean the master cylinder reservoir with clean denatured alcohol.
- Dry the master cylinder reservoir with non-lubricated compressed air.
Notice: Brake fluid will damage electrical connections and painted surfaces. Use shop cloths, suitable containers, and fender covers to prevent brake fluid from contacting these areas. Always re-seal and wipe off brake fluid containers to prevent spills.
Installation Procedure
- Lubricate the new seals and the master cylinder reservoir bayonets with clean brake fluid.
- Install the seals, making sure they are fully seated.
- Install the master cylinder reservoir onto the master cylinder by pressing straight down by hand until pin holes are aligned.
- Tap in pins to retain master cylinder reservoir to the master cylinder. Be careful not to damage the master cylinder reservoir or master cylinder.
- Fill the master cylinder reservoir to full level mark using only Delco® Supreme II Brake fluid, or equivalent DOT 3 brake fluid (DOT 4 for Europe), as specified in Maintenance and Lubrication.
- Install the electrical connector (1) to brake low fluid sensor.
- Bleed the hydraulic system. Refer to Hydraulic Brake System Bleeding .
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.
