Circuit/System Description

The liftgate can be released by operating the liftgate release switch or by pressing the liftgate release button on the remote keyless entry transmitter. The gear selector may be in any position, but the vehicle speed must equal 0 for the liftgate to release.

When the ignition is ON, the body control module (BCM) supplies battery positive voltage to the liftgate ajar switch through the liftgate ajar switch signal circuit. When the liftgate is opened, the signal circuit is connected to ground through the liftgate ajar switch ground circuit and the voltage is pulled low within the BCM. In response, the BCM sends a low speed GMLAN serial data message to the driver information center (DIC) in the instrument panel cluster (IPC) to illuminate the liftgate ajar indicator.