2008 GMC Sierra 1500 Pickup Owner's Manual - Page 233

BAND: Press to listen to the radio when a portable audio device is playing. The portable audio device continues playing, so you might want to stop it or turn it off. CD/AUX (CD/Auxiliary): Press to play a CD when a portable audio device is playing. Press again and the system begins playing audio from the connected portable audio player. If a portable audio player is not connected, "No Input Device Found" displays. DVD/CD AUX (CD/Auxiliary): Press to cycle through DVD, CD, or Auxiliary when listening to the radio. The DVD/CD text label and a message showing track or chapter number displays when a disc is in either slot. Press again and the system automatically searches for an auxiliary input device, such as a portable audio player. If a portable audio player is not connected, "No Aux Input Device" displays. If a disc is in both the DVD slot and the CD slot the DVD/CD AUX button cycles between the two sources and not indicate "No Aux Input Device". If a front auxiliary device is connected, the DVD/CD AUX button cycles through all available options, such as: DVD slot, CD slot, Front Auxiliary, and Rear Auxiliary (if available). 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 3-109 for more information. Using an MP3 (Radio with Six-Disc Player) MP3 CD-R or CD-RW Disc The radio plays MP3 files that were recorded on a CD-R or CD-RW disc. The files can be recorded with the following fixed bit rates: 32 kbps, 40 kbps, 56 kbps, 64 kbps, 80 kbps, 96 kbps, 112 kbps, 128 kbps, 160 kbps, 192 kbps, 224 kbps, 256 kbps, and 320 kbps or a variable bit rate. Song title, artist name, and album are available for display by the radio when recorded using ID3 tags version 1 and 2. Compressed Audio The radio also plays discs that contain both uncompressed CD audio (.CDA files) and MP3 files. By default the radio shows the MP3 label on the left side of the screen but plays both file formats in the order in which they were recorded to the disc. 3-97