2003 GMC Sonoma Owner's Manual - Page 188

Compact Disc Messages If the disc comes out, it could be for one of the following reasons: Radio with Six-Disc CD * 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. The disc is dirty, scratched, wet or upside down. * The air is very humid. If so, wait about an hour and try again. 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. Playing the Radio PWR (Power): Push this knob to turn the system on and off. VOL (Volume): Turn the knob to increase or to decrease volume. 3-6 1