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 RUN position.
  2. Turn the headlamp switch to the PARK position.

The following lamps are in the ON position:

    • The rear side marker lamp
    • The rear park lamp
    • The license lamp
    • The tail lamp
    • The front side marker lamp
    • The front park lamps

2

Operate the left and then the right turn signal switch.

The left and right turn and side marker lamps flash continuously ON and OFF.

3

Turn the hazard switch to the ON position.

  1. The front and rear turn lamps flash continuously from the minimum intensity to the maximum intensity.
  2. The front and rear side marker lamps flash continuously from OFF to ON.

4

  1. Turn the hazard switch to the OFF position.
  2. Turn the headlamp switch to the PARK position.
  3. Press the brake pedal.
  1. The following lamps are in the ON position:
  2. • Side marker lamps
    • Park lamps
    • License lamps
  3. The following lamps are ON at the maximum brightness:
  4. • The center high mounted stop lamp (CHMSL)
    • The tail lamps
    •  Stop Lamps Inoperative

5

Release the brake pedal.

The CHMSL turns OFF and the tail lamps go to low intensity.

Stop Lamps Always On

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