GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Ensure that the ambient light sensor receives a sufficient amount of light. Use a trouble light if necessary.
  2. Move the headlamp switch to the PARK position.
    • The park and side marker lamps turn ON.
    • The tail lamps turn ON.
    • The license lamps turn ON.

2

  1. Depress the brake pedal.
  2. Release the brake pedal.
  1. The stop lamps and the high mounted stop lamp turn ON when the brake pedal is depressed.
  2. The stop lamps and the high mounted stop lamp turn OFF when the brake pedal is released.
    •  Stop Lamps Inoperative
    •  Stop Lamps Inoperative

3

Depress the hazard lamp switch.

The front and rear hazard lamps flash ON and OFF.

Hazard Lamps Inoperative

4

  1. Turn the ignition switch to the ON position.
  2. Move the turn signal lever to the LEFT TURN position.
  3. Move the turn signal lever to the RIGHT TURN position.
  1. The DRL headlamps turn ON.
  2. The left turn signals and the indicator flash while in the LEFT TURN position.
  3. The right turn signals and the indicator flash while in the RIGHT TURN position.

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