GM Service Manual Online
For 1990-2009 cars only
Lift Glass Relay: The scan tool displays ON/OFF. The state of the relay control output as commanded by the BCM.

Liftglass Switch: The scan tool dispays ON/OFF. The scan tool will display the status of the lift glass switch.

Rear Gate/Door: The scan tool displays Open/Closed. The scan tool displays the status of the rear gate/door.

Liftglass Switch: The scan tool displays Active/Inactive. The status of the liftglass switch.