GM Service Manual Online
For 1990-2009 cars only

Rear Hatch/Gate Description and Operation Gate Ajar Ind

Gate Ajar Indicator

The IPC illuminates the GATE AJAR indicator when the body control module (BCM) detects that the rear hatch is ajar or open (signal circuit is low). The IPC receives a class 2 message from the BCM requesting illumination. If the vehicle is in the forward or reverse gear position, the BCM activates an audible warning.