GM Service Manual Online
For 1990-2009 cars only

Brake Booster Pump System Check RH Drive

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to the ON position.
  2. Pump the brake pedal.

The power brake booster pump motor is heard running.

Brake Booster Pump Inoperative

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