GMC 2003 Yukon Denali User Manual page 205

Setting the Tone (Bassnreble)
AUDIO: Press and release the AUDIO knob until
BASS, MID, or TREB appears on the display. Turn the
knob to increase or to decrease. The display will
show the bass, midrange, or treble level. If a station is
weak or noisy, you may want to decrease the treble.
To adjust the bass, midrange, and treble to the middle
position, push and hold the AUDIO knob. The radio
will produce one beep and adjust the display level to the
middle position.
To adjust all tone and speaker controls to the middle
position, push and hold the AUDIO knob when no tone
or speaker control is displayed. The radio will produce
one beep and display ALL with the level display in
the middle position.
AUTO EQ (Automatic Equalization): Press this button
to choose bass and treble equalization settings.
The setting last chosen will appear on the display when
you first press AUTO EQ. Each time you press this
button, another setting will appear on the display and
AUTO EQ will switch
to
one of the preset settings
listed below.
Your audio system allows you to choose from four
different equalization settings: normal, driver, rear and
spacious. These settings can be used while listening to
the radio, a cassette or a CD.
NORMAL: This setting enhances the stereo effect.
DRIVER: This setting gives the driver the best
sound quality.
REAR: This setting gives the rear seat passengers the
best sound quality.
SPACIOUS: This setting makes the listening space
seem larger.
The radio will save separate AUTO EQ settings for each
preset and source.
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