GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the headlamps on.
  2. Make sure the headlamp dimmer switch is in the low beam position.

Only the low beam headlamps are on.

2

Turn the headlamp dimmer switch to the high beam position.

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

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