GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Savana 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Interior Lamps System Check

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.

3

Open and close each door one at a time.
    • The courtesy lamps turn on when each door is opened.
    • The courtesy lamps fade out each time each door is closed.
    • The stepwell lights illuminate with the other courtesy lamps, if equipped.
    • The door lamps illuminate with the courtesy lamps.

4
  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.

Instrument Panel Compartment Lamp Inoperative

5
  1. Open each sunshade mirror cover.
  2. Close each sunshade mirror cover.
    • The sunshade mirrors lamp turn on.
    • The sunshade mirror lamp goes out.

Vanity Mirror Lamp Inoperative

6
  1. Place the headlamp switch in the PARK position.
  2. Place the courtesy lamp switch to the ON position.
  3. Open and close each door.

All courtesy lamps illuminate.

Door Lamp Inoperative - Left Side Front

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