Chevrolet 2003 Impala Owner's Manual page 181

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.
When a message is not available from a station, NO
INFO will be displayed.
TRAF (Traffic): Press this button to receive traffic
announcements. If the current tuned station does not
broadcast traffic announcements, the radio will seek to a
station that does. When the radio finds a station that
broadcasts traffic announcements, it will stop. TRAF will
appear on the display and when a traffic announcement
comes on you will hear it. If no station is found, NO
TRAF will appear on the display.
When a traffic announcement comes on the current
station or on a related network station, you will hear it,
even if the volume is muted or a compact disc is
playing. The traffic symbol and TRAF will appear on the
display while the announcement plays. If the compact
disc player was being used, play will stop during
the announcement.
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.
Traffic Interrupt Feature: Your radio can interrupt the
play of a cassette, 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. 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 cassette, or XMTM,
or DAB station. If no station is found, NO TRAF
will appear on the display.
Radio Messages
CAL ERR (Calibration Error): This message is
displayed when the radio has not been calibrated
properly for the vehicle. You must return to the
dealership for service.
LOCKED: This message is displayed when the
THEFTLOCK@ system has locked up. You must return
to the dealership for service.
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