1996 GMC Sonoma Owner's Manual - Page 123

Setting the Tone BASS: Press the BASS up arrow to increase bass and the BASS down arrow to decrease bass. Press the center of the button for the factory-preset bass position. The bass level will be displayed for about 10 seconds whenever this button is pressed. TREB: Press the TREB up arrow to increase treble and the TREB down arrow to decrease treble. Press the center of the button for the factory-preset treble position. The treble level will be displayed for about 10 seconds whenever this button is pressed. Adjusting the Speakers BAL: This control ring behind the POWER-VOL knob adjusts the balance between the left and right speakers. Balance will be displayed briefly when using this control. FADE: This control ring behind the TUNE knob adjusts the balance between the front and rear speakers. Fade levels will be briefly displayed. Playing a Compact Disc Insert a disc partway into the slot, label side up. The radio will pull the disc the rest of the way in. Wait a few seconds and the disc should play. I f the disc comes back out and/or ERR appears on the display: 0 You are driving on a very rough road. (The disc should play when the road gets smoother.) The disc is upside down. I t is dirty, scratched or wet. It is very humid. (If so, wait about a n hour and try again.) 0 0 0 The disc player is too hot to play the disc. (As soon as things get back to normal. the disc should play.) Turn the POWER-VOL knob to turn the system on. 3-13