Were you sent here from the Hydraulic Brake Symptom table?

Go to Step 2

Go to Diagnostic Starting Point - Hydraulic Brakes

1. Inspect the stop lamp switch for proper adjustment to ensure that the brake pedal is fully releasing. Refer to Brake Pedal Position Sensor Calibration .
2. Inspect the torque converter clutch (TCC)/ cruise control release switch, for proper adjustment to ensure that the brake pedal is fully releasing. Refer to Torque Converter Clutch/Cruise Control Release Switch Adjustment .

Did you find and correct a condition?

Go to Step 10

Go to Step 3

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

Did you find and correct a condition?

Go to Step 10

Go to Step 4

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

Did you find and correct a condition?

Go to Step 10

Go to Step 5

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 7

Go to Step 6

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

Did you complete the replacement?

Go to Step 10

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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 9

Go to Step 8

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 10

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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 10

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