2004 GMC Canyon 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 AUDIO 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 the rear speakers, press and release AUDIO 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, end out of audio by waiting for the display to change to the time display. Then press and hold AUDIO for more than two seconds until you hear a beep. CEN will appear on the display. Fade may not be available if you have a regular cab model. Radio Messages CAL (Calibrated): 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. Your vehicle must be returned to the dealer for service. 3-46