Buick 2004 Century Owner's Manual page 158

Finding a Program Type (PTY) Station
To select and find a desired PTY perform the
following:
1. Press P-TYP to activate program type select mode.
The P-TYPE symbol will appear on the display.
2. Turn the AUDIO knob to select a PTY.
3. Once the desired PTY is displayed, press either
SEEK arrow to select the PTY and take you to
the PTY's first station.
4. If you want to go to another station within that PTY
and the PTY is displayed, press either SEEK arrow
once. If the PTY is not displayed, press either
SEEK arrow twice to display the PTY and then to
go to another station.
5. Press P-TYP to exit program type select mode.
If PTY times out and is no longer on the display,
go back to Step 1.
If both PTY and TRAF are on, the radio will search for
station with the selected PTY and traffic
announcements.
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SCAN: You can scan the stations within a PTY by
performing the following:
1. Press P-TYP to activate program type select mode.
The P-TYPE symbol will appear on the display.
2. Turn the AUDIO knob to select a PTY.
3. Once the desired PTY is displayed, press and hold
either SEEK arrow, and the radio will begin
scanning the stations in the PTY.
4. Press and hold either SEEK arrow to stop at a
station.
If both PTY and TRAF are on, the radio will scan for
stations with the selected PTY and traffic
announcements.
BAND (Alternate Frequency): Alternate frequency
allows the radio to switch to a stronger station with the
same program type. To turn alternate frequency on,
press and hold BAND for two seconds. AF ON will
appear on the display. The radio may switch to stronger
stations.
To turn alternate frequency off, press and hold BAND
again for two seconds. 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.