GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Place the courtesy lamp switch in the OFF position.

All of the interior lamps are off.

Courtesy or Dome Lamps Always On

2

Place the courtesy lamp switch in the ON position.

The courtesy lamps turn on.

3

Open and close each door one at a time.

    • The courtesy lamps turn on for approximately 25 seconds.
    • The courtesy lamps fade out each time.

4

Press the unlock button on the keyless entry transmitter.

    • Courtesy lamps turn on for approximately 40 seconds.
    • Courtesy lamps fade out.

5

Open the IP compartment.

The IP compartment lamp turns on.

Instrument Panel Compartment Lamp Inoperative

6

Open the rear compartment.

The rear compartment lamp turns on.

Rear Compartment Lamp Inoperative

7

  1. Turn each reading switch to the ON position.
  2. Open each vanity mirror cover.
    • The courtesy/reading lamps turn on.
    • The office work lamp turns on.
    • The vanity mirrors turn on.

Courtesy/Reading Lamps Inoperative

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