GMC 2007 Envoy - Manual (Page 254)

TRAF (Traffic): If TRAF displays, the tuned
station broadcasts traffic announcements and you
will hear a traffic announcement when the
tuned radio station broadcasts one.
If the station does not broadcast traffic
announcements, press the TRAF button and the
radio seeks to a station that does. When a station
that broadcasts traffic announcements is found,
the radio stops seeking and TRAF displays.
If no station is found that broadcasts traffic
announcements, No Traf displays.
If TRAF displays, press the TRAF button to turn
off the traffic announcements.
The radio plays the traffic announcement if the
volume is low. The radio interrupts the play
of a CD if the last tuned station broadcasts
traffic announcements.
This function does not apply to XM™ Satellite
Radio Service.
Radio Messages
CAL ERR (Calibration Error): The audio system
has been calibrated for your vehicle from the
factory. If CAL ERR displays it means that
the radio has not been configured properly for
your vehicle and it must be returned to your
dealer for service.
LOCKED: This message is displayed when the
THEFTLOCK
® system has locked up. Take
your vehicle to your dealer for service.
If any error occurs repeatedly or if an error cannot
be corrected, contact your dealer.
Radio Messages for XM™ Only
See XM Radio Messages on page 277 later in this
section for further detail.
Playing a CD
Insert a CD partway into the slot, label side up.
The player pulls it in, and READING displays. The
CD should begin playing. If you want to insert a
CD with the ignition off, first press the eject button
or the DISPL knob.
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