Chevrolet Silverado 2007 Owner's Manual page 337

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 System on page 359 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.
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 power 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 System on
page 359 for more information.
Playing an MP3/WMA CD-R or
CD-RW Disc
A radio 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" in
the index.
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