2005 Buick LaCrosse Owner's Manual - Page 195

Setting the Tone (Bass/Treble) e (Bass/Treble): Push and release this knob until BAS or TRE appears on the display. Turn this knob to increase or to decrease. The display will show the bass or the treble level. If a station is weak or noisy, decrease the treble. To adjust the bass and the treble to the middle position, push and hold the tone knob. The radio will produce one beep. To adjust all tone and speaker controls to the middle position, push and hold the tone knob when no tone or speaker control is displayed. CEN will appear on the display and you will hear a beep. To adjust the balance and the fade to the middle position, push the speaker knob, then push it again and hold it until you hear one beep. To adjust all tone and speaker controls to the middle position, push and hold the speaker knob when no tone or speaker control is displayed. CEN will appear on the display and you will hear a beep. Radio Messages CAL (Calibration): The audio system has been calibrated for your vehicle from the factory. If CAL appears on the display it means that the radio has not been configured properly for your vehicle and it must be returned to your GM dealer for service. LOC (Locked): This message is displayed when the THEFTLOCK® system has locked up. Take your vehicle to your GM dealer for service. If any error occurs repeatedly or if an error cannot be corrected, contact your GM dealer. Adjusting the Speakers (Balance/Fade) e (Balance/Fade): To adjust the balance between the right and the left speakers, push and release this knob until BAL appears on the display. Turn the knob to move the sound toward the right or the left speakers. To adjust the fade between the front and the rear speakers, push and release the speaker knob until FAD appears on the display. Turn the knob to move the sound toward the front or the rear speakers. 3-81