Chevrolet 2002 S10 Pickup Owner's Manual page 192

Finding a PTY Preset Station
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P TYPE LIST (Program Type): Turn this knob
clockwise or counterclockwise to select the Program
Type (PTY) you want to listen to. TYPE and a PTY will
appear on the display. Press the SEEK TYPE button and
the radio will seek to the first RDS broadcaster of the
selected program type. If the radio cannot find the
desired program type, NONE will appear on the display
and the radio will return to the last station you were
listening to.
AM FM (Alternate Frequency): Alternate frequency
allows the radio to switch to a stronger station with the
same program type. Press and hold AM FM for
two seconds to turn alternate frequency on. AF ON will
appear on the display. The radio may switch to stronger
stations. Press and hold AM FM again for two seconds
to turn alternate frequency off. AF OFF will appear on
the display. The radio will not switch to other stations.
When you turn the ignition off and then on again,
the alternate frequency feature will automatically be
turned on.
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SEEK TYPE: Press this button to go to a station with
the last selected PTY; TYPE and the last selected PTY
will appear on the display, if it is not already showing.
Press SEEK TYPE a second time to seek. If a station
with the selected PTY is not found, the radio will return
to the original station and display NONE.
RDS Messages
ALERT: Alert warns of national or local emergencies.
You will not be able to turn off alert announcements.
ALERT! appears on the display when an alert
announcement plays. When an alert announcement
comes on the current radio station, you will hear it, even
if the volume is muted or a cassette tape or compact disc
is playing. If the cassette tape or compact disc player is
playing, play will stop for the announcement and resume
when the announcement is finished.
This function will only work during actual emergency
broadcasts, and will not work during tests of the
emergency broadcast system. This feature is not
supported by all RDS stations.