Were you sent here from the Hydraulic Brake Symptom table?

Go to Step 2

Go to Diagnostic Starting Point - Hydraulic Brakes

Is the vehicle equipped with a drum-in-rotor type of park brake system?

Go to Step 3

Go to Step 5

Ensure the park brake shoes are not adjusted too tightly, possibly causing drag under certain conditions.

Are the park brake shoes adjusted too tightly?

Go to Step 4

Go to Step 5

1. Clean and inspect the park brake shoes for excessive wear and/or damage.
2. Inspect the drum portion of the rotors for excessive wear, blueing discoloration, heat spots, and excessive radial runout.
3. If any of these conditions are present, replace the affected components.
4. Adjust the park brake system.

Did you find and correct a condition?

Go to Step 12

Go to Step 5

Inspect the park brake system for proper operation. Refer to Park Brake System Diagnosis .

Did you find and correct a condition?

Go to Step 12

Go to Step 6

Inspect the disc brake system for proper operation. Refer to Disc Brake System Diagnosis .

Did you find and correct a condition?

Go to Step 12

Go to Step 7

1. Separate the brake booster pushrod from the brake pedal. Refer to Brake Pedal Assembly Replacement .
2. Inspect the brake corners to determine if the brake drag condition is still present.

Do the brake corners still exhibit the brake drag condition?

Go to Step 9

Go to Step 8

Replace the brake pedal assembly. Refer to Brake Pedal Assembly Replacement .

Did you complete the replacement?

Go to Step 11

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1. Separate the master cylinder from the brake booster. Do not disconnect any brake pipes. Refer to Master Cylinder Replacement .
2. Inspect the brake corners to determine if the brake drag condition is still present.

Do the brake corners still exhibit the brake drag condition?

Go to Step 11

Go to Step 10

Replace the brake booster assembly. Refer to Power Vacuum Brake Booster Replacement , or Power Brake Booster Replacement .

Did you complete the replacement?

Go to Step 12

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Inspect the hydraulic brake system for proper operation. Refer to Hydraulic Brake System Diagnosis .

Did you find and correct a condition?

Go to Step 12

Go to Diagnostic Starting Point - Hydraulic Brakes

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