2002 GMC Savana Van Owner's Manual - Page 156

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 the AUDIO button until the display goes blank. 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. LOC (Locked): This message is displayed when the TheftlockR system has locked up. Your vehicle must be returned to the dealership for service. Playing a Cassette Tape Your tape player is built to work best with tapes that are up to 30 to 45 minutes long on each side. Tapes longer than that are so thin they may not work well in this player. The longer side with the tape visible should face to the right. If the ignition is on, but the radio is off, the tape can be inserted and will begin playing. If you hear nothing but a garbled sound, the tape may not be in squarely. Press the eject button to remove the tape and start over. While the tape is playing, use the VOL, AUDIO and SEEK controls just as you do for the radio. The radio will display UP if the top side of the tape is playing. DN (Down) will appear if the bottom side is playing. If you want to insert a tape when the ignition is off, first press the eject button or the RCL knob. If an error appears on the display, see "Cassette Tape Messages" later in this section. 3-17