2004 Chevrolet Express Van Owner's Manual - Page 170

Adjusting the Speakers (Balance/Fade) AUDIO: To adjust the balance between the right and the left speakers, press and release the AUDIO button until BAL appears on the display. Then press and hold the up or the down arrow to move the sound toward the right or the left speakers. To adjust the fade between the front and rear speakers, press and release the AUDIO button until FAD appears on the display. Then press and hold the up or the down arrow to move the sound toward the front or the rear speakers. To adjust balance or fade to the middle position, select BAL or FAD. Then press and hold AUDIO for more than two seconds until you hear a beep. L and a zero or F and a zero will appear on the display. To adjust both tone controls and both speaker controls to the middle position, first end out of audio mode by pressing another button, causing the radio to perform that function, or by waiting five seconds for the display to return to time of day. Then press and hold AUDIO for more than two seconds until you hear a beep. CEN will appear on the display. Radio Messages CAL (Calibration): Your audio system has been calibrated for your vehicle from the factory. If CAL appears on the display it means that your radio has not been configured properly for your vehicle and must be returned to the dealer for service. LOC (Locked): This message is displayed when the THEFTLOCK® system has locked up. You must return to the dealer for service. Playing a CD Insert a CD partway into the slot, label side up. The player will pull it in and the CD should begin playing. CD will appear on the display. If you want to insert a CD when the ignition is off, first press the eject button or the RCL knob. If you insert a CD with the radio off and the ignition on, it will start to play. If you turn off the ignition with a CD in the player, it will stay in the player. When you turn on the ignition or radio, the CD will start playing where it stopped, if it was the last selected audio source. 3-50