GM Service Manual Online
For 1990-2009 cars only

Interior Lights System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Turn the Sunroof Map Lamp switch to the ON position.

The Map Lamp illuminates.

Courtesy/Reading Lamps Inoperative

2

Turn the Sunroof Map Lamp switch to the OFF position.

The Map Lamp extinguishes.

Courtesy Lamps Always On .

3

Perform any of the following:

    • Turn the Dome Lamp switch to the ON position.
    • Activate the keyless entry to unlock the doors.
    • Open any door.

The Dome Lamp will illuminate.

Courtesy or Dome Lamps Inoperative

4

Turn the Dome Lamp switch to the OFF position with the doors CLOSED.

The Dome Lamp does not illuminate.

Dome Lamps Always On

5

Open the trunk.

The Rear Compartment Lamp Illuminates.

Rear Compartment Lamp Inoperative

6

Close the trunk.

The Rear Compartment Lamp extinguishes.

Rear Compartment Lamp Always On

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