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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc Brakes >> Symptom Tests >> Brakes Drag

Brakes Drag

  1. If you were sent here from General Diagnosis, go to step  2. If you were not sent here from General Diagnosis, see DIAGNOSTIC STARTING POINTS  under TROUBLE SHOOTING.
  2. If the vehicle is equipped with an adjustable stop light switch and/or an adjustable cruise control release switch, go to step  3. If the vehicle is not equipped with an adjustable stop light switch and/or an adjustable cruise control release switch, go to step  4.
    • Inspect the stop light switch for proper adjustment to ensure that the brake pedal is fully releasing.
    • Inspect the cruise control release switch, if equipped, for proper adjustment to ensure that the brake pedal is fully releasing.
    If the condition was found and corrected, go to step  11 If the condition was not found and corrected, go to step  4.
  4. Inspect the park brake system for proper operation. See PARK BRAKE SYSTEM DIAGNOSIS  under TROUBLE SHOOTING. If the condition was found and corrected go to step  11. If the condition was not found and corrected, go to step  5.
  5. Inspect the disc brake system for proper operation. See DISC BRAKE SYSTEM DIAGNOSIS  under TROUBLE SHOOTING. If the condition was found and corrected, go to step  11. If the condition was not found and corrected, go to step  6.
  6. Separate the brake booster pushrod from the brake pedal. Inspect the brake corners to determine if the brake drag condition is still present. If the brake corners still exhibit the brake drag condition, go to step  8. If the brake corners DO NOT exhibit the brake drag condition, go to step  7.
  7. Replace the brake pedal assembly. If the replacement has been completed, go to step  11.
    1. Separate the master cylinder from the brake booster. DO NOT disconnect any brake pipes.
    2. Inspect the brake corners to determine if the brake drag condition is still present.
    If the brake corners still exhibit the brake drag condition, go to step  10. If the brake corners DO NOT exhibit the brake drag condition, go to step  9.
  9. Replace the brake booster assembly. See BRAKE BOOSTER  under REMOVAL & INSTALLATION. After repairs are complete, go to step  11.
  10. Inspect the hydraulic brake system for proper operation. See HYDRAULIC BRAKE SYSTEM DIAGNOSIS  under TROUBLE SHOOTING. If the condition was found and corrected, go to step  11. If the condition was not found and corrected, see HYDRAULIC BRAKE SYSTEM  under DIAGNOSTIC STARTING POINTS in TROUBLE SHOOTING.
  11. Install or connect components that were removed or disconnected during diagnosis. Road test the vehicle in order to confirm proper operation. See BRAKE SYSTEM VEHICLE ROAD TEST  under SYSTEM TESTS. If the condition is still present, go to step  2. If the condition is not present, system okay.
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