GMC 2008 Acadia - Manual (Page 229)

Radio(s) (MP3)
Your vehicle has one of these radios as its audio system.
Radios with CD and DVD
Radios with CD and DVD have a Bose ® Surround Sound
System. Some of its features are explained later in this
section under, “Adjusting the Speakers (Balance/Fade)”.
If your vehicle has a Rear Seat Entertainment (RSE)
system, it has a CD/DVD radio. See Rear Seat
Entertainment (RSE) System on page 3-115 for
more information on the vehicle’s RSE system.
Radio with CD shown, Radio with
Six-Disc CD similar
Radio with CD and DVD
3-87