GMC Sierra 2011 Owner's Manual page 237

Care of CDs and DVDs
If playing a CD-R or CD-RW, the
sound quality can be reduced due to
CD-R or CD-RW quality, the method
of recording, the quality of the music
that has been recorded, and the
way the CD-R or CD-RW has been
handled. Handle them carefully.
Store CD-Rs or CD-RWs in their
original cases or other protective
cases and away from direct sunlight
and dust. The CD or DVD player
scans the bottom surface of the
disc. If the surface of a disc is
damaged, such as cracked, broken,
or scratched, the disc does not play
properly or not at all. Do not touch
the bottom side of a disc while
handling it; this could damage the
surface. Pick up discs by grasping
the outer edges or the edge of the
hole and the outer edge.
If the surface of a disc is soiled,
clean it with a soft, lint free cloth or
dampen a clean, soft cloth in a mild,
neutral detergent solution mixed
with water. Make sure the wiping
process starts from the center to
the edge.
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, USB port, or rear
auxiliary jack.
O
Press the 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 if
equipped) by pressing the BAND
button or the DVD/CD AUX button to
select CD slot, DVD slot, front
auxiliary input, USB port, or rear
auxiliary input (if available).
If a playback device is plugged into
the radio s front auxiliary input jack,
USB port, or the rear auxiliary jack,
the front seat passengers are able
to listen to playback from this
source through the vehicle
I n f o r ma t i o n P r o v i d e d b y :
Infotainment System
speakers. See Using the Auxiliary
Input Jack in Auxiliary Devices on
page 7 31, or Audio/Video (A/V)
Jacks under Rear Seat
Entertainment (RSE) System on
page 7 36 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) System on page 7 45 for
more information.
Inserting a Disc
Insert a disc partway into either slot,
label side up. The player pulls it in
and the disc should begin playing.
(Loading a disc into the system,
depending on media type and
format, ranges from 5 to 20 seconds
for a CD, and up to 30 seconds for a
DVD to begin playing.)
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