GMC 2008 Envoy Denali Owner's Manual page 218

Playing an MP3/WMA
Insert a CD partway into the slot, label side up. The
player pulls it in, and READING displays. The CD should
begin playing and the CD symbol displays. To insert a
CD while the ignition is off, first press the
or the DISPL knob.
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 to play where it stopped,
if it was the last selected audio source.
As each new track starts to play, the track number and
song title displays.
x
1 FLD (Previous Folder): Press this button to go
to the first track in the previous folder. Press this button
while in folder random mode to go to the first track in
the previous folder and random the tracks in that folder.
w
2 FLD (Next Folder): Press this button to go to
the first track in the next folder. Press this button while
in folder random mode to go to the first track in the
next folder and random the tracks in that folder.
3 REV (Reverse): Press and hold this pushbutton
to reverse quickly within a track. Press and hold
this pushbutton for less than two seconds to
reverse at 10 times the normal playing speed.
3-84
Press and hold it for more than two seconds to reverse
at 20 times the normal playing speed. Release this
pushbutton to play the passage. REV and the elapsed
time of the track displays.
4 FWD (Forward): Press and hold this pushbutton
Z button
to advance quickly within a track. Press and hold this
pushbutton for less than two seconds to advance at
10 times the normal playing speed. Press and hold it
for more than two seconds to advance at 20 times the
normal playing speed. Release this pushbutton to play
the passage. FWD and the elapsed time of the track
displays.
6 RDM (Random): Press and release this pushbutton
to play the tracks of a current folder or playlist, in random
order. FLDR RDM displays. Once all of the tracks a
current folder or playlist have played the system moves
on to the next folder or playlist and play all of the tracks
in random order.
To play all tracks on the CD in random order, press and
hold this pushbutton for two seconds. A beep sounds and
DISC RDM displays. This feature does not work with
playlists.
When in random, press and release either SEEK arrow to
go to the next or previous random track.
Press and release this pushbutton again to turn off
random play. NO RDM displays.