Chevrolet 2003 Tahoe Owner's Manual page 256

INFO (information): If the current station has a
message, INFO will appear on the display. Press this
button to see the message. The message may display
the artist and song title, call in phone numbers, etc.
If the whole message is not displayed, parts of it
will appear every three seconds. To scroll through the
message at your own speed, press the INFO button
repeatedly. A new group of words will appear on
the display with each press. Once the complete
message has been displayed, INFO will disappear from
the display until another new message is received.
The old message can be displayed by pressing
the INFO button until a new message is received or a
different station is tuned to.
TRAF (Traffic): TRAF will appear on the display if the
tuned station broadcasts traffic announcements. To
receive the traffic announcement from the tuned station,
press this button. Brackets will be displayed around
TRAF and when a traffic announcement comes on the
tuned radio station you will hear it.
If the current tuned station does not broadcast traffic
announcements, press this button and the radio
will seek to a station that does. When the radio finds a
station that broadcasts traffic announcements, it will
stop. Brackets will be displayed around TRAF and when
a traffic announcement comes on the tuned radio
station you will hear it. If no station is found, NO
TRAFFIC will appear on the display.
For DAB (Canada only, if your radio is equipped with
DAB), when the TRAF button is pressed, DAB does not
seek to a station that broadcasts traffic. DAB only
checks the current frequency for traffic support.
This function does not apply to XMTM Satellite Radio
Service.
Traffic interrupt Feature: Your radio can interrupt the
play of a CD, or XMTM, or DAB station. Press the
TRAF button. The radio will seek to a station that
broadcasts traffic announcements. When the radio finds
a station that broadcasts traffic announcements, it
will stop. Brackets around TRAF will appear on the
display. When a traffic announcement comes on
the station that was found, you will hear it. When the
traffic announcement is over, the radio will resume play
of the CD, or XMTM, or DAB station. If no station is
found, NO TRAFFIC will appear on the display.
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