GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Place the courtesy lamp switch in OFF.

All of the interior lamps are off.

Courtesy or Dome Lamps Always On

2

Place the courtesy lamp switch in ON.

The courtesy lamps turn on.

    •  Dome Lamps Inoperative
    •  Dome Lamps Inoperative
    •  Dome Lamps Inoperative
    •  Dome Lamps Inoperative

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.
    • Dome Lamps Inoperative with Rear Door Open
    • Dome Lamps Inoperative with Side Front Door Open
    • Dome Lamps Inoperative with Side Door Open
    • Stepwell Lamp Inoperative - Left Front
    • Stepwell Lamp Inoperative - Right Front
    • Stepwell Lamp Inoperative - Side

4

Press the unlock button on the keyless entry transmitter.

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

Instrument Panel Compartment Lamp Inoperative

5

  1. Open the IP compartment.
  2. Close the IP compartment.

The IP compartment lamp turns on once the compartment is open, then turns off when the compartment is shut.

Vanity Mirror Lamp Inoperative

6

  1. Turn each reading switch to ON.
  2. Open each sunshade mirror cover.
  3. Close each sunshade mirror cover.
    • The courtesy/reading lamps turn on.
    • The sunshade mirrors lamp turn on.
    • The sunshade mirror lamp goes out.

Door Lamp Inoperative - Left Side Front

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