2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 325

Radios with CD and DVD Audio Output Only one audio source can be heard through the speakers at one time. An audio source is defined as DVD slot, CD slot, XM, FM/AM, Front Auxiliary Jack, or Rear Auxiliary Jack. Press the O button to turn the radio on. The radio can be heard through all of the vehicle speakers. Front seat passengers can listen to the radio (AM, FM, or XM) by pressing the BAND button or the DVD/CD AUX button to select CD slot, DVD slot, front or rear auxiliary input (if available). If a playback device is plugged into the radio's front auxiliary input jack or the rear auxiliary jack, the front seat passengers are able to listen to playback from this source through the vehicle speakers. See "Using the Auxiliary Input Jack(s)" later in this section, or "Audio/Video (A/V) Jacks" under, Rear Seat Entertainment (RSE) System on page 4‑136 for more information. In some vehicles, depending on audio options, the rear speakers can be muted when the RSA power is turned on. See Rear Seat Audio (RSA) on page 4‑145 for more information. Playing an MP3 CD-R or CD-RW Disc The Radio with CD (MP3), Radio with USB and CD (MP3), and Radio with USB and Six-Disc CD (MP3) have the capability of playing an MP3 CD-R or CD-RW disc. For more information on how to play an MP3 CD-R or CD-RW disc, see Using an MP3 (Radios with CD) on page 4‑109 or Using an MP3 (Radios with CD and DVD) on page 4‑116 for more information. Playing an MP3/WMA CD-R or CD-RW Disc Radios with CD and DVD has the capability of playing an MP3/WMA CD-R or CD-RW disc. For more information on how to play an MP3/WMA CD-R or CD-RW disc, see Using an MP3 (Radios with CD) on page 4‑109 or Using an MP3 (Radios with CD and DVD) on page 4‑116 for more information. 4-101