GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to the ON position.
  2. Engage the park brake.

The brake indicator lamp illuminates.

Brake Warning Indicator Inoperative .

2

  1. Release the park brake.
  2. Remove the master cylinder reservoir cap.

The brake indicator lamp illuminates.

Brake Warning Indicator Inoperative .

3

  1. Verify that the park brake is released and that the master cylinder reservoir cap is on tightly.
  2. Verify that the brake indicator lamp is illuminated.

The brake indicator lamp is not illuminated.

Brake Warning Indicator Always On .

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