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 ON position.
  2. Turn the headlamp switch to HEAD position.
  3. Slowly rotate the headlamp leveing switch dial to the lowest position.

Both headlamp bulb assemblies move down simultaneously

LINK

2

Slowly rotate the headlamp leveing switch dial to the highest position.

Both headlamp bulb assemblies move up simultaneously

LINK

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