Chevrolet 2004 Malibu Owner's Manual page 202

AUTO TONE/AUTO EQ (Automatic Equalization):
Press this button to select customized equalization
settings designed for country, jazz, talk, pop, rock,
and classical.
The equalization setting last chosen will appear on the
display when you first press this button. Each time
you press this button, another equalization setting will
appear on the display and automatic tone or automatic
equalization will switch to that preset equalization
settings.
To return to the manual mode, press the AUTO TONE
or AUTO EQ button until CUSTOM appears on the
display. You can also manually adjust the bass,
midrange, and treble using the tone button.
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Adjusting the Speakers (Balance/Fade)
S
BAL/FADE / (Balance/Fade): To adjust
the balance between the right and the left speakers,
push and release the balance and fade button until
BAL appears on the display. Turn the ADJ knob to move
the sound toward the right or the left speakers.
To adjust the fade, push and release the balance and
fade button until FADE appears on the display. 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 one beep and the speaker control will be adjusted
to the middle position.
To adjust both speaker controls to the middle position,
push and hold the tone button when no speaker
control is displayed. ALL CENTERED will appear on the
display and you will hear one beep. The balance and
fade will be adjusted to the middle position.