Chevrolet 2003 Silverado Owner's Manual page 256

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 a 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 AM,
six FM1 and six FM2, six XM1 and six XM2 (USA
only, if equipped), by performing the following steps:
1. Turn the radio on.
2. Press BAND to select AM, FM1, FM2, 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 you hear a beep. Whenever you press that
numbered pushbutton, the station you set will return
and the equalization that you selected will also be
automatically selected for that pushbutton.
6. Repeat the steps for each pushbutton.
3-100
Setting the Tone (Bass/Treble)
AUDIO: Push the AUDIO knob until BASS 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 or treble to the middle position, select
BASS 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.
AUTO EQ (Automatic Equalization): Press this button
to choose bass and treble equalization settings
designed for country/western, jazz, talk, pop, rock and
classical stations. Selecting CUSTOM or changing
bass or treble, returns the EQ to the manual bass and
treble settings.
The radio will save separate AUTO EQ settings for each
preset and source.
If you radio is equipped with the Bose audio system,
your equalization settings are either CUSTOM or TALK.