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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 495 (Disc Brakes & Drum Brakes) >> Symptom Testing >> Brake Fluid Loss

Brake Fluid Loss

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Were you sent here from DIAGNOSTIC STARTING POINT - HYDRAULIC BRAKE? If so, go to next step. If not, see DIAGNOSTIC STARTING POINT - HYDRAULIC BRAKE  under TROUBLE SHOOTING.
  2. Inspect the hydraulic brake system for proper operation. See HYDRAULIC BRAKE SYSTEM TESTING  under SYSTEM TESTING. Did you find and correct a condition? If so, go to step  4 . If not, go to next step.
  3. Inspect the disc brake system for proper operation. See DISC BRAKE SYSTEM TESTING  under SYSTEM TESTING. Did you find and correct a condition? If so, go to step  6 . If not, go to next step.
  4. Separate the master cylinder from the vacuum brake booster. DO NOT disconnect any brake pipes. See MASTER CYLINDER  . Inspect the rear of the master cylinder for a brake fluid leak. Inspect for brake fluid in the vacuum brake booster. Did you find a brake fluid leak? If so, go to next step. If not, go to DIAGNOSTIC STARTING POINT - HYDRAULIC BRAKE  .
  5. Replace the brake master cylinder and the vacuum brake booster. See MASTER CYLINDER  and POWER BRAKE BOOSTER  under REMOVAL & INSTALLATION. After repairs are complete, go to next step.
  6. Install or connect components that were removed or disconnected during diagnosis. Road test the vehicle to confirm proper operation. See BRAKE SYSTEM VEHICLE ROAD TEST  under TROUBLE SHOOTING. Is the condition still present? If so, go to step  2 . If not, then system is okay.