LIFTGATE OPEN Indicator
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
Manual Liftgate
The instrument panel cluster illuminates the LIFTGATE OPEN indicator when the body control module (BCM) detects that the liftgate is open. The instrument panel cluster 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.
Power Liftgate
The liftgate control module detects the liftgate ratchet switch is closed to ground indicating the liftgate is open. The instrument panel cluster receives a serial data message from the liftgate control module indicating the liftgate ajar status and the driver information center illuminates the LIFTGATE OPEN indicator.