GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Turn the headlamp switch to the PARK position.

    • Park and side marker lamps light.
    • Tail lamps light.
    • License lamps light.
    • Clearance lamps light (if equipped).
    • Roof marker lamps light (if equipped).
    • Endgate identification lamps light (if equipped).

2

  1. Depress the brake pedal.
  2. Release the brake pedal.
    • Stoplamps and the CHMSL light when the brake pedal is depressed.
    • Stoplamps and the CHMSL turn OFF when the brake pedal is released.

3

Depress the hazard lamp switch.

Front and rear hazard lamps flash.

Hazard Lamps Inoperative

4

  1. Turn the ignition switch to the ON position.
  2. Position the turn signal lever to the LH turn position.
  3. Position the turn signal lever to the RH turn position.
    • LH turn signals and indicator flash while in the LH turn position.
    • RH turn signals and indicator flash while in the RH turn position.

Turn Signal Lamps Inoperative - Left or Right Side

5

Open the vehicles hood.

The underhood lamp lights.

Underhood Lamp Inoperative

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