GMC 2009 Sierra 1500 Crew Cab Owner's Manual page 319

c (Stop): Press this button to stop playing, fast
reversing, or fast forwarding a DVD. Press this button
twice to return to the beginning of the DVD.
s
(Play/Pause): Press this button to start playing a
DVD. Press this button while a DVD is playing to
pause it. Press it again to continue playing the DVD.
While the DVD is playing, the DVD can be played slowly
by pressing the play/pause button then pressing the fast
forward button. The DVD continues playing in a slow play
mode. Also, reverse can be played slowly by pressing the
play/pause button and then pressing the fast reverse
button. To cancel slow play mode, press the play/pause
button.
t
(Previous Track/Chapter): Press this button to return
to the start of the current track or chapter. Press this
button again to go to the previous track or chapter.
This button might not work when the DVD is playing the
copyright information or the previews.
u
(Next Track/Chapter): Press this button to go to
the beginning of the next chapter or track. This button
might not work while the DVD is playing the copyright
information or the previews.
r (Fast Reverse): Press this button to quickly reverse
the DVD or CD. To stop fast reversing a DVD video,
press the play/pause button. To stop fast reversing a
DVD audio or CD, release the fast reverse button. This
button might not work when the DVD is playing the
copyright information or the previews.
[ (Fast Forward): Press this button to fast forward the
DVD or CD. To stop fast forwarding a DVD video, press
the play/pause button. To stop fast forwarding a DVD
audio or CD, release the fast forward button. This button
might not work while the DVD is playing the copyright
information or the previews.
e (Audio): Press this button to change audio tracks on
DVDs that have this feature when the DVD is playing.
The format and content of this function vary for each disc.
{
(Subtitles): Press this button to turn ON/OFF
subtitles and to move through subtitle options when a
DVD is playing. The format and content of this function
vary for each disc.
AUX (Auxiliary): Press this button to switch the system
between the DVD player and an auxiliary source.
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