Buick 2004 Rendezvous Owner's Manual page 240

To scan preset stations, press and hold either SCAN
arrow for more than four seconds. PRESET SCAN will
appear on the display. You will hear a double beep.
The radio will go to the first preset station stored on your
pushbuttons, play for a few seconds, then go on to
the next preset station. Press either SCAN arrow again
to stop scanning presets.
The radio will scan only to stations that are in the
selected band and only to those with a strong signal.
Setting Preset Stations
The six numbered pushbuttons let you return to your
favorite stations. You can set up to 30 stations
(six FM1, six FM2, and six AM, six XM1 and six XM2
(48 contiguous US states, if equipped), 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.
3-100
5. Press and hold one of the six numbered
pushbuttons until you hear a beep. Whenever you
press that numbered pushbutton, the station
you set will return and the equalization that you
selected will be automatically stored for that
pushbutton.
6. Repeat the steps for each pushbutton.
Setting the Tone (Bass/Treble)
AUDIO: Push the AUDIO knob until BASS, MID, or
TREB appears on the display. Turn the knob to increase
or to decrease. If a station is weak or noisy, you may
want to decrease the treble.
To adjust bass, midrange, or treble to the middle
position, select BASS, MID, or TREB and push and hold
the AUDIO knob. The radio will produce one beep
and adjust the display level to zero.
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 CENTERED will appear on the display.