GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Check the master cylinder fluid level.

Master cylinder fluid level between MIN and MAX.

Refer to Master Cylinder Reservoir Filling

2

Check the power steering fluid level.

Power steering fluid level between ADD and FULL.

Refer to Checking and Adding Power Steering Fluid in Power Steering System.

3

Perform Hydraulic Booster Fictional Test. Refer to Hydraulic Booster Functional Test .

Brake pedal falls away and then pushes back.

Refer to Accumulator Leak-Down System Not Holding Charge

4

  1. Turn ignition OFF.
  2. Park brake not applied.
  3. Start the engine.

Brake warning indicator illuminates briefly (approximately 5 seconds).

Refer to the appropriate procedure:

5

With the vehicle in PARK, perform the Brake Pedal Travel Test. Refer to Brake Pedal Travel .

    • Brake pedal moves steadily towards floor, approximately 2-3 in.
    • Brake pedal stops and is firm against the pressure (Hydraulic brake booster may hiss or clunk/click/clatter with high brake pedal effort).

Refer to the appropriate procedure:

6

  1. Press the brake pedal.
  2. Shift vehicle into DRIVE.
  3. Perform the Brake System Test. Refer to Brake System Testing .
    • Braking action starts after applying the brakes.
    • Brakes do not grab - brake pedal does not vibrate.
    • Vehicle stops without excessive pedal effort.
    • Vehicle stops without pulling to one side.
    • Front and rear brakes apply evenly.
    • Vehicle stops without noise coming from the brakes.
    • Vehicle stops without noise coming from the hydraulic booster.
    • Brakes do not drag after releasing the brake pedal.
    • Brakes do not make noise while driving.

Refer to the appropriate procedure:

7

While driving the vehicle, turn the steering wheel without pressing the brake pedal.

Brakes do not apply while turning the steering wheel.

Refer to Brakes Self Apply When Turning Steering Wheel

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.