GM Service Manual Online
For 1990-2009 cars only

Headlight Doors Diagnostic System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Turn the headlamp switch to the ON position (headlamps on).

Headlight doors open.

2

Turn the headlamp switch to the OFF position.

Headlight doors close.

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