GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the IP dimmer switch to the OFF position.
  2. Turn the headlamp switch to the PARK position.

All of the IP lamps are on.

Instrument Panel Lamps Inoperative - One

2

Slowly turn the IP lamp dimmer switch to the LOW position.

The brightness of the IP lamps slowly decrease to low.

Instrument Panel Lamps Do Not Dim

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