2002 Chevrolet Venture Owner's Manual - Page 247

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, end out of audio mode by pressing another button, which the radio will perform that function, or by waiting 5 seconds which the radio will go to the clock display. 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 dealership for service. AM-FM Stereo with Compact Disc Player with Radio Data System (RDS) and Automatic Tone Control (If Equipped) Playing the Radio PWR (Power): Press this knob to turn the system on and off. A VOL " (Volume): Turn the knob clockwise to increase volume. Turn it counterclockwise to decrease volume. 3-15