GM Service Manual Online
For 1990-2009 cars only
  1. Fill the reservoir with brake fluid. Ensure that the reservoir remains full throughout the entire bleeding process.
  2. Install adapters into each master cylinder outlet port.
  3. Attach a piece of rubber tubing to each adapter. Submerge the other end of the rubber tubing in the reservoir. Ensure that the tubes remain submerged in the fluid.
  4. Use a wooden or plastic dowel in order to slowly push in the master cylinder piston and release. Repeat the procedure until there is no sign of air (bubbles) in the brake fluid.