GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Place the interior lamps switch in the OFF position.
  2. Close all of the doors.
  3. Wait 20 seconds.

All of the courtesy lamps are OFF.

Courtesy Lamps Always On

2

Press the UNLOCK button on the keyless entry transmitter.

All of the courtesy lamps light and remain lit for 20 seconds.

Remote Keyless Entry System Check

3

Open and close each door one at a time.

    • All of the courtesy lamps light with the door open.
    • All of the courtesy lamps turn OFF 20 seconds after the doors are closed.

4

Manually unlock each front door using a key, one at a time.

All of the courtesy lamps light and remain lit for 20 seconds.

5

Place the interior lamps switch in the ON position.

All of the courtesy lamps light.

Courtesy Lamps Inoperative with Headlamp Switch

6

Place the interior lamps switch in the OFF position.

All of the courtesy lamps turn OFF.

Courtesy Lamps Always On

7

  1. Open each vanity mirror cover.
  2. Slide each vanity mirror dimming switch up and down.

All of the vanity mirror lamps light. Each vanity mirror dims and brightens as the switch is operated.

Vanity Mirror Lamp Inoperative

8

Open the IP compartment.

The IP compartment lamp lights.

Instrument Panel Compartment Lamp Inoperative

9

Open the rear compartment lid.

The rear compartment lamp lights.

Rear Compartment Lamp Inoperative

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