GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Move the headlamp dimmer switch to LOW.
  2. Turn the headlamp switch to HEAD.

The low beam headlamps are on.

Headlamps Inoperative - Low Beams

2

Turn the headlamp dimmer switch to the HIGH position.

    • The high beam headlamps are on.
    • The high beam indicator is lit.
    • The low beam headlamps are off.

Headlamps Inoperative - High Beams

3

  1. Move the headlamp dimmer switch to LOW.
  2. Hold the flash-to-pass switch on.
    • The high beam headlamps are on.
        The high beam indicator is lit.
    • The low beam headlamps are on.

4

Release the flash-to-pass switch.

The low beam headlamps are on.

Headlamps Inoperative - Low Beams

5

Turn the headlamp switch to the OFF position.

    • The high beam headlamps are off.
    • The high beam indicator is off.

Headlamps Inoperative - High Beams

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