2008 GMC Sierra 1500 Pickup Owner's Manual - Page 225

To play the tracks from a CD loaded in the radio with CD and DVD, press the DVD/CD AUX button when not sourced to the CD, or insert a disc partway into the slot. A RDM label displays. To play tracks from a single CD in random order, press the pushbutton positioned under the RDM label until Random Current Disc displays. Press the pushbutton again to turn off random play. BAND: Press to listen to the radio when a CD is playing. The CD remains inside the radio for future listening. For the radio with CD and DVD, press to listen to the radio when a CD or DVD is playing. The CD or DVD remains inside the radio for future listening or for viewing entertainment. CD/AUX (CD/Auxiliary): Press this button to play a CD when listening to the radio. The CD icon and a message showing the disc and/or track number displays when a CD is in the player. Press this button 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 Input Device Found" displays. DVD/CD AUX (Auxiliary): Press to cycle through DVD, CD, or Auxiliary when listening to the radio. The DVD/CD text label and a message showing the 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. If a disc is inserted into top DVD slot, the rear seat operator can turn on the video screen and use the remote control to navigate the CD (tracks only) through the remote control. 3-89