GM Service Manual Online
For 1990-2009 cars only

To flush the hydraulic brake system at each bleeder valve use the following procedure:

  1. Open the valve 1 1/2 turns.
  2. Force brake fluid through the pipes, hoses and bleeder valves until the brake fluid comes out clear in color.
  3. Refer to Hydraulic Brake System Bleeding .

  4. Check the master cylinder fluid level after you flush at each bleeder valve.
  5. After flushing, refill the master cylinder to the correct fluid level, as required.