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.

The following components are all on:

    • Rear park position
    • License
    • Front park position lamps

2

  1. Turn the ignition switch to the RUN position.
  2. Operate the turn signal switch to the left or the right position.

The front and rear turn signal lamps, side repeater lamps and front cornering lamps flash continuously on and off.

3

  1. Turn the turn signal switch to the OFF position.
  2. Turn the headlamp switch to the OFF position.

The turn signal, side repeater and cornering lamps are off.

Cornering Lamps Always On

4

  1. Turn the ignition to the OFF position.
  2. Turn the hazard switch to the ON position.
    • The front and rear turn signal lamps flash continuously from minimum intensity to maximum intensity.
    • The front side repeater lamps flash continuously from off to on.

5

  1. Turn the hazard switch to the OFF position.
  2. Depress the brake pedal.

The following components are on at maximum:

    • Center High Mounted Stop Lamp (CHMSL)
    • Stop lamps
    •  Stop Lamps Inoperative

6

Release the brake pedal.

The stop lamps are off

Stop Lamps Always On

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