GMC 2010 Sierra Owner's Manual page 322

Playing a CD (In Either the DVD or
CD Slot)
Insert a CD partway into the slot, label side up. The
player pulls it in and the CD 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).
If the ignition or radio is turned off, with a CD in the
player, it stays in the player. When the ignition or radio
is turned on, the CD starts playing where it stopped, if it
was the last selected audio source. The CD is
controlled by the buttons on the radio faceplate or by
the RSA unit. See Rear Seat Audio (RSA) on
page 4 145 for more information. The DVD/CD decks,
(upper slot is the DVD deck and the lower slot is the CD
deck) of the radio are compatible with most audio CDs,
CD-R, CD-RW, and MP3s.
When a CD is inserted, the text tab DVD or CD symbol
displays on the left side of the radio display. As each
new track starts to play, the track number displays.
The CD player can play the smaller 3 inch (8 cm) single
CDs with an adapter ring. Full-size CDs and the smaller
CDs are loaded in the same manner.
Z
EJECT or CD (Eject): Press and release to eject
the disc that is currently playing. A CD ejecting from a
radio with CD and DVD, ejects from the bottom slot.
A beep sounds and Ejecting Disc displays. Once the
4-98
disc is ejected, Remove Disc displays. The disc can be
removed. If the disc is not removed, after several
seconds, the disc automatically pulls back into the
player.
For the Six-Disc CD player, press and hold for
two seconds to eject all discs.
Z
DVD (Eject): Press and release to eject the disc
that is currently playing in the top slot. A beep sounds
and Ejecting Disc displays.
If loading and reading of a disc cannot be completed,
such as with an unknown format error, etc., and the disc
fails to eject, press and hold for more than five seconds
to force the disc to eject.
(Tune): Turn to select tracks on the CD that is
currently playing.
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SEEK : Press the left arrow to go to the start of
the current track, if more than ten seconds on the CD
have played. Press the right arrow to go to the next
track.
For Radios with CD and DVD, Press the left arrow
to go to the start of the current track, if more than
five seconds on the CD have played. If less than
five seconds on the CD have played, the previous track
plays. Press the right arrow to go to the next track.
If either arrow is held, or pressed multiple times, the
player continues moving backward or forward through
the tracks on the CD.