GM Service Manual Online
For 1990-2009 cars only
Courtesy Ground: The scan tool displays Present/Not Present. The input of the courtesy ground is displayed as Not Present when the ground for the courtesy lamps is not detected.

Courtesy Switch: The scan tool displays Active/Inactive. The courtesy switch input of the Body Control Module (BCM) is displayed as Active when the courtesy lamps switch is ON.

Door Jamb Switch: The scan tool displays Active/Inactive. The door jamb switch input to the Body Control Module (BCM) is displayed is Active when a door is open.

Driver Door Switch: The scan tool displays Open/Closed. The driver door switch input to the Body Control Module (BCM) is displayed as Open when the driver door is open.

Front Fog Lamps: The scan tool displays Active/Inactive. The front fog lamp input to the Body Control Module (BCM) is displayed as Active when the front fog lamps are ON.

Inadvert. Power Output: The scan tool displays ON/OFF. This output of the Body Control Module (BCM) is displayed as ON when the inadvertent power output is present.

LCM Lights on Chime: The scan tool displays ON/OFF. The LCM lights on chime input to the Body Control Module (BCM) is displayed as ON when the headlamp switch is ON, with the ignition off, and the key removed.

Headlamps: The scan tool displays Active/Inactive. The headlamp input to the Body Control Module (BCM) is displayed as Active, if the headlamps are ON.

Park Brake Switch: The scan tool displays ON/OFF. The park brake switch input to the Body Control Module (BCM) is displayed as ON when the park brake is applied.

Rear Fog Lamp Switch: The scan tool displays Active/Inactive. The rear fog lamp switch input to the Body Control Module (BCM) is displayed as Active when the rear fog lamp switch is pressed.

Rear Fog Lamp Relay: The scan tool displays ON/OFF. The rear fog lamp relay output of the Body Control Module (BCM) is displayed as ON when the BCM commands the rear fog lamp relay ON.

Trunk Ajar: The scan tool displays Active/Inactive. The trunk ajar switch input to the Body Control Module (BCM) is displayed as Active when the trunk is open.

Theater Dimming #1: The scan tool displays ON/OFF. This output of the Body Control Module (BCM) is displayed as ON, if the BCM commands the IP courtesy lamps.

Theater Dimming #2: The scan tool displays ON/OFF. This output of the Body Control Module (BCM) is displayed as ON, if the BCM commands the dome lamp, reading lamps, and rear view mirror lamps ON.