Cadillac 2007 XLR Owner's Manual page 296

When a traffic announcement comes on the
current radio station or a related network station,
you will hear it even if the volume is muted or
a CD is playing. If the audio system tunes
to a related network station for a traffic
announcement, it will return to the original station
when the announcement is finished. If the CD
player was being used, the CD will stay in
the player and resume play at the point where it
stopped.
Touch RDS followed by TA again to turn TA off.
MSG (Message): When RDS is on, if the
current station has a message, MSG will appear
on the display. Touch MSG from the preset
menu to view the message. If the whole message
does not appear on the display, parts of the
message will appear every three seconds until the
message is completed. Once the complete
message has been displayed, MSG will disappear
from the display until another new message is
received. MSG will remain available to allow you
to display the entire message again.
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PTY: PTY allows you to seek only stations with
types of programs you want to listen to. This
button is used to turn on and off Program Type
(PTY) features.
With RDS on, touch RDS, followed by PTY. The
PTY display will turn on. Touch RDS followed
by this button again to turn the PTY display off.
Select PTY (Select Program Type): With
RDS and PTY on, touch RDS, then SEL PTY. The
PTY menu will appear. Use the up and down
arrows to select a PTY. Touch your PTY selection
and the system will return you to the screen
with the preset stations shown. See Steps 1
through 7 under "Preset Station Menu" to store the
selected PTYs. The selected PTY is then stored
on the preset. You can now touch the PTY preset
to recall your settings.
When the PTY display is on, press TUNE/SEEK
and SCAN to find radio stations of the PTY
selected. The last PTY selected will be used for
seek and scan modes. If a station with the
selected PTY is not found, NONE FOUND will
appear on the display. If both PTY and TA are on,
the audio system will search for stations with
traffic announcements and the selected PTY.