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Home >> GMC >> 1993 >> C3500 HD 5.7 K, Automatic >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc & Drum Brake System >> Bleeding Brake System >> Manual Bleeding

Manual Bleeding

NOTE: Air tends to cling to caliper walls. When bleeding vehicles with disc brakes, lightly tap caliper to help remove air.
  1. Fill master cylinder. Install bleeder hose to bleeder screw at first wheel to be serviced. See BLEEDING SEQUENCE  under BLEEDING BRAKE SYSTEM. Submerge other end of hose in glass jar partially filled with brake fluid.
  2. Open bleeder screw 3/4 - 1 turn. Slowly press brake pedal to floor. Note fluid flow. Close bleeder screw. Release pedal. Repeat procedure until air bubbles are no longer present in fluid flow.