Rear Audio Control (If equipped)
WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The Rear Seat Audio Controls interface to the radio using Low Speed GM LAN and allow the rear seat passengers to control the cabin's audio system. Rear occupants can turn the radio on/off, change the volume, change input sources, seek and cycle presets. For additional information on Rear Audio Controls, refer to the vehicle owner's manual.