Cadillac 2003 Escalade Owner's Manual page 215

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 cassette
tape or compact disc player was being used, play
will stop during the announcement.
This function does not apply to XMTM Satellite Radio
Service.
Traffic Interrupt Feature: Your radio can interrupt the
play of a cassette, CD, or XMTM. 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, CD, or XMTM. 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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