GM Service Manual Online
For 1990-2009 cars only

Liftgate Ajar Indicator Description and Operation for Chevrolet Traverse 2009

LIFTGATE OPEN Indicator

The instrument panel cluster (IPC) illuminates the LIFTGATE OPEN indicator when the body control module (BCM) detects that the liftgate is open. The IPC receives a serial data message from the BCM requesting illumination. If the vehicle is in the forward or reverse gear position, the BCM activates an audible warning.