Interior Lamps System Check. GMC Truck Safari

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1999 🢒 Safari - 2WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Interior Lamps System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

Place the courtesy lamp switch in OFF.

All of the interior lamps are off.

Place the courtesy lamp switch in ON.

The courtesy lamps turn on.

•	Courtesy or Dome Lamps Inoperative

•	Illuminated Entry Lamps Inoperative

•	Courtesy/Reading Lamps Inoperative

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.

•	Courtesy/Reading Lamps Inoperative

•	Courtesy or Dome Lamps Inoperative

•	Courtesy or Dome Lamps Always On

•	Illuminated Entry Lamps Inoperative

Press the unlock button on the keyless entry transmitter.

•	Courtesy lamps turn on for approximately 40 seconds.

•	Courtesy lamps fade out.

•	Courtesy/Reading Lamps Inoperative

•	Courtesy or Dome Lamps Inoperative

•	Courtesy or Dome Lamps Always On

•	Illuminated Entry Lamps Inoperative

•	Open the IP compartment.

•	Close the IP compartment.

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

•	Courtesy or Dome Lamps Inoperative

•	Instrument Panel Compartment Lamp Inoperative

•	Turn each reading switch to ON.

•	Open each sunshade mirror cover.

•	Close each sunshade mirror cover.

•	The courtesy/reading lamps turn on.

•	The sunshade mirrors lamp turn on.

•	The sunshade mirror lamp goes out.

•	Courtesy/Reading Lamps Inoperative

•	Courtesy or Dome Lamps Inoperative

•	Vanity Mirror Lamp Inoperative

Turn the headlamp and panel dimmer switch to the PARK position.

The interior component lamps illuminate.

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