GMC 2003 Safari Owner's Manual page 170

AM FM: Press this button to listen to the radio when
playing a CD. The CD symbol will still display but
the letters CD will be replaced with either AM, FM1 or
FM2. If the radio is turned off, the disc will stay in
the player and will resume playing at the point where
it stopped.
CD AUX (Auxiliary): Press this button to play a CD
when listening to the radio. When a disc is playing,
the letters CD and the CD symbol will appear on the
display. If the radio is turned off, the disc will stay in
the player and will resume playing at the point where
it stopped.
EJECT: Press this button to eject the disc from the
player and play the radio. When the same or a new
disc is inserted, the disc will start playing on track one.
If a compact disc is left sitting in the opening for
more than a few seconds, the player will pull the CD
back in. The radio will continue playing. When the
ignition is off, press this button to load a CD.
Compact Disc Messages
ERR (Error): If this message appears and the disc
comes out, it could be for one of the following reasons:
0
You're driving on a very rough road. When the
road becomes smoother, the disc should play.
It's very hot. When the temperature returns to
normal, the disc should play.
e
The disc is dirty, scratched, wet or upside down.
The air is very humid. If so, wait about an hour and
try again.
Press RECALL to make ERR go off of the display.
If the CD is not playing correctly, for any other reason,
try a known good CD.
If any error occurs repeatedly or if an error can't be
corrected, contact your dealer.
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