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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1014 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> Brake Fluid Loss

Brake Fluid Loss

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, 2004 Chevrolet Cab & Chassis Silverado, and 2003 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
Brake Fluid Loss

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 7  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 7  Go to Step 4 
4 Is the vehicle equipped with vacuum assist brakes? Go to Step 5  Go to Diagnostic Starting Point - Hydraulic Brakes 
5
  1. Separate the master cylinder from the vacuum brake booster. Do not disconnect any brake pipes. Refer to Master Cylinder Replacement (Vacuum Boost)  or Master Cylinder Replacement (Hydraulic Boost) .
  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 6  Go to Diagnostic Starting Point - Hydraulic Brakes 
6 Replace the brake master cylinder and the vacuum brake booster. Refer to Master Cylinder Replacement (Vacuum Boost)  or Master Cylinder Replacement (Hydraulic Boost)  and Vacuum Brake Booster Replacement .
Did you complete the replacement?		 Go to Step 7  -
7
  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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