GMC 2007 Envoy Denali Owner's Manual page 251

Setting Preset Stations
Up to 30 stations (six FM1, six FM2, and six AM,
six XM1 and six XM2 (if equipped)), can be
programmed on the six numbered pushbuttons, by
performing the following steps:
1. Turn the radio on.
2. Press BAND to select FM1, FM2, AM, or XM1
or XM2.
3. Tune in the desired station.
4. Press AUTO EQ to select the equalization.
5. Press and hold one of the six numbered
pushbuttons until a beep sounds. When
that numbered pushbutton is pressed, the
station that was set, returns and the
equalization that was selected is stored for
that pushbutton.
6. Repeat the steps for each pushbutton.
Setting the Tone
(Bass/Midrange/Treble)
AUDIO: Push and release the AUDIO knob until
BASS, MID (midrange) (without Bose
(treble) displays. Turn the knob to increase or to
decrease the tone. The display shows the bass,
midrange (without Bose
station is weak or has static, decrease the treble.
To adjust the bass, midrange (without Bose
the treble to the middle position while it is displayed,
push and hold the AUDIO knob. The radio produces
one beep.
To adjust all tone and speaker controls to the
middle position, push and hold the AUDIO knob
while no tone or speaker control is displayed.
ALL CENTERED displays and a beep sounds.
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), or the treble level. If a
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