2009 GMC Acadia Owner's Manual - Page 508

Auxiliary Devices The vehicle may have a Rear Entertainment System (RSE). The RSE has audio adapters that lets you connect auxiliary devices. The audio can be heard through the speakers or through the wireless or wired headphones. See "Audio/Video Jacks" under "Rear Seat Entertainment System" in the Index of the vehicle's owner manual for more information. Drivers are encouraged to set up any auxiliary device while the vehicle is in P (Park). See "Defensive Driving" in the Index of the vehicle's owner manual for more information on driver distraction. To switch the RSE system to use an auxiliary device: 1. Connect the auxiliary device to the RSE system. 2. Press the AUDIO key. Then press it repeatedly until AUX (auxiliary) is selected, or select the AUX screen button. A front auxiliary device must be connected before the front auxiliary device can be selected. The rear auxiliary device can be selected by pressing the REAR AUX button. The rear auxiliary device system requires all video and audio inputs to be connected to ensure proper audio fidelity of the rear auxiliary device. The rear seat passengers can also use the remote control to change the functions of the RSE. See "Rear Seat Entertainment System" in the Index of the vehicle's owner manual for more information. 3-22