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Manual Bleeding

NOTE: Air tends to cling to caliper walls. When bleeding disc brake equipped vehicles, lightly tap caliper to help remove air.
  1. Fill master cylinder. Install bleeder hose to first bleeder valve to be serviced. See BLEEDING SEQUENCE  table. Submerge other end of hose in clean glass jar partially filled with clean brake fluid.
  2. Open bleeder valve 3/4-1 turn. Depress brake pedal slowly through full travel. Close bleeder valve and release pedal. Repeat procedure until flow of fluid shows no signs of air bubbles.
Fig 1: Wheel Cylinder Bleeding Procedure
G30346Courtesy of GENERAL MOTORS CORP.
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