GMC 2001 Yukon XL Owner's Manual page 193

SCAN: Press and hold SEEK for two seconds until
SCAN appears on the display. SCAN allows you to
listen to stations for a few seconds. The receiver will
continue to scan and momentarily stop at each station
until you press the button again. The sound will mute
while scanning.
PUSHBUTTONS: The six numbered pushbuttons
let you return to your favorite stations. You can set up
to 18 stations (six AM, six FM1 and six FM2). Just:
1. Turn the radio on.
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2. Press AM FM to select the band.
3. Tune in the desired station.
4. Press AUTO TONE to select the setting you prefer.
5. Press and hold one of the six pushbuttons. The
sound will mute. When it returns, release the button.
Whenever you press that numbered button, the
station you set will return and the tone you selected
will be automatically selected for that button.
6. Repeat the steps for each pushbutton.
P.SCAN: The preset scan button lets you scan through
your favorite stations stored on your pushbuttons.
Select either the AM, FM1 or FM2 mode and then
press P.SCAN. It will scan through each station stored
on your pushbuttons and stop for a few seconds before
continuing to scan through all of the pushbuttons.
Press P.SCAN again or one of the pushbuttons to stop
scanning to listen to a specific stored station. P.SCAN
will light up on the display while in this mode. If one
of the stations stored on a pushbutton is too weak for
the location you are in, the radio display will show the
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channel number (P1 P6) for several seconds before
advancing to the next preset station.
Setting the Tone
BASS: Press lightly on this knob to release it from its
stored position. Turn the knob clockwise to increase bass
and counterclockwise to decrease bass. When the BASS
control is turned, the AUTO TONE display will go blank.
TREB: Press lightly on this knob to release it from
its stored position. Turn the knob clockwise to increase
treble and counterclockwise to decrease treble. When
the TREB control is turned, the AUTO TONE display
will go blank. If a station is weak or noisy, you may
want to decrease the treble.
Push these knobs back into their stored positions when
you're not using them.
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