Circuit/System Description
WARNING: This page is about a different car, the 2012 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
The rear compartment antenna is located at the extreme rear of the center console, between the rear passenger seats. The antenna is used to establish low frequency communications with the keyless entry transmitter. When the driver presses the vehicle on/off switch, the Keyless Entry Control Module communicates with the rear compartment antenna.