2003 GMC 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. 3-45