GMC 2003 Sonoma Owner's Manual page 178

Finding a Station
AM FM: Press this button to switch between AM, FM1
and FM2. The display will show your selection.
TUNE: Turn this knob to choose radio stations.
q r
SEEK : Press the right or the left arrow to seek
to the next or to the previous station and stay there.
The radio will seek only to stations that are in the
selected band and only to those with a strong signal.
q r
PSCAN (Preset Scan): Press and hold one
of the arrows for more than two seconds. The radio will
produce one beep. The radio will scan to the first
preset station stored on the pushbuttons, play for a few
seconds, then go on to the next station. SCAN will
be displayed. Press one of the arrows again or one of
the pushbuttons to stop scanning presets.
The radio will scan only to presets that are in the
selected band and only to those with a strong signal.
3-52
Setting Preset Stations
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) by performing the following
steps:
1. Turn the radio on.
2. Press AM FM to select AM, FM1 or FM2.
3. Tune in the desired station.
4. Press AUTO TONE to choose the bass and treble
equalization that best suits the type of station you
are listening to.
5. Press and hold one of the six numbered
pushbuttons. The radio will produce one beep.
Whenever you press that numbered pushbutton, the
station you set will return and the bass and treble
equalization that you selected will also be
automatically selected for that pushbutton.
6. Repeat the steps for each pushbutton.