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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1445 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> Brake Fluid Loss

Brake Fluid Loss

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Brake Fluid Loss Diagnostic Test

Step Action Yes No
1 Were you sent here from the Hydraulic Brake Symptom table? Go to Step 2  Go to Diagnostic Starting Point - Hydraulic Brakes 
2 Inspect the hydraulic brake system for proper operation. Refer to Hydraulic Brake System Diagnosis .
Did you find and correct a condition?		 Go to Step 6  Go to Step 3 
3 Inspect the disc brake system for proper operation. Refer to Disc Brake System Diagnosis .
Did you find and correct a condition?		 Go to Step 6  Go to Step 4 
4
  1. Separate the master cylinder from the vacuum brake booster. Do not disconnect any brake pipes. Refer to Master Cylinder Replacement .
  2. Inspect the rear of the master cylinder for a brake fluid leak.
  3. Inspect for brake fluid in the vacuum brake booster.
Did you find a brake fluid leak?		 Go to Step 5  Go to Diagnostic Starting Point - Hydraulic Brakes 
5 Replace the brake master cylinder and the vacuum brake booster. Refer to Master Cylinder Replacement  and Vacuum Brake Booster Replacement .
Did you complete the replacement?		 Go to Step 6  -
6
  1. Install or connect components that were removed or disconnected during diagnosis.
  2. Road test the vehicle to confirm proper operation. Refer to Brake System Vehicle Road Test .
Is the condition still present?		 Go to Step 2  System OK
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