2004 Chevrolet Malibu Owner's Manual - Page 171

Setting the Tone (Bass/Treble) TONE /P/Q (Bass/Treble): To adjust the bass or the treble, press and release the tone button repeatedly until BASS or TREB appears on the display. Then turn the ADJ knob to increase or to decrease. If a station is weak or noisy, you may want to decrease the treble. To adjust bass or treble to the middle position, select BASS or TREB. Then press and hold the tone button for more than two seconds. You will hear a beep and the level will be adjusted to the middle position. To adjust the tone controls to the middle position, first end out of tone by pressing another button, causing the radio to perform that function, or by waiting five seconds for the display to return to the default display. Then press and hold the tone button for more than two seconds until you hear a beep. ALL CENTERED will appear on the display. Adjusting the Speakers (Balance/Fade) BAL/FADE /S (Balance/Fade): To adjust the balance between the right and the left speakers, press and release the balance and fade button until BAL appears on the display. Then turn the ADJ knob 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 the balance and fade button until FADE appears on the display. Then turn the ADJ knob to move the sound toward the front or the rear speakers. To adjust balance or fade to the middle position, select BAL or FADE. Then press and hold the balance and fade button for more than two seconds. You will hear a beep and the level will be adjusted to the middle position. To adjust the speaker controls to the middle position, first end out of balance and fade by pressing another button, causing the radio to perform that function, or by waiting five seconds for the display to return to the default display. Then press and hold the balance and fade button for more than two seconds until you hear a beep. ALL CENTERED will appear on the display. 3-55