Caution: Brake fluid may be irritating to the skin or eyes. In case of contact, take the following actions:

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.

Use Delco Supreme 11® Brake Fluid GM P/N 1052535, or an equivalent DOT-3 motor vehicle brake fluid. Always store brake fluid in a closed, sealed container. Never use previously opened, improperly sealed containers of stored brake fluid. Always use new brake fluid, or fluid from a properly sealed container.

Re-seal brake fluid containers immediately after use. Brake fluid left in open or improperly sealed containers will absorb moisture. Moisture can lower the brake fluid boiling point, causing the following problems:

Notice: Power steering fluid and brake fluid cannot be mixed. If brake seals contact power steering fluid or steering seals contact brake fluid, seal damage will result.

Use the correct fluids. The master cylinder and brake system use brake fluid. The hydraulic booster system uses power steering fluid.

If the brake fluid contains improper fluid, water, or other contaminants, the brake fluid may boil or corrode rubber components in the hydraulic brake system.

Evidence of rubber deterioration occurs in the following areas:

If you find rubber deterioration, replace all rubber parts in the brake system, including the hoses. Check for brake fluid on the brake linings. Replace brake linings that are contaminated with brake fluid.

If the brake fluid is contaminated and the master cylinder piston seals are good, check for leaks and excessive heat conditions. If no leaks or excessive heat conditions are found, perform the following procedure:

1. Drain the brake system.
2. Flush the system.

Refer to Hydraulic Brake System Flushing .

3. Refill the system.
4. Bleed the system.

Refer to Hydraulic Brake System Bleeding .

Flushing the brake hydraulic system involves running new brake fluid through the system and out the open bleeder valves, until the fluid runs clear. Use Delco Supreme 11® Brake Fluid GM P/N 1052535, or an equivalent DOT-3 motor vehicle brake fluid. Flush the brake hydraulic system for the following reasons: