Pontiac 2005 Bonneville Owner's Manual page 200

If the entire message is not displayed, parts of the
message will appear every three seconds. To scroll
through the message, press and release the INFO
button. A new group of words will appear on the display
after every press of this button. Once the complete
message has been displayed, INFO will disappear from
the display until another new message is received.
The last message can be displayed by pressing
the INFO button. You can view the last message until a
new message is received or a different station is
tuned to.
TRAF (Traffic): If TRAF appears on the display, the
tuned station broadcasts traffic announcements
and when a traffic announcement comes on the tuned
radio station you will hear it.
If the station does not broadcast traffic announcements,
press the TRAF button and the radio will seek to a
station that does. When a station that broadcasts traffic
announcements is found, the radio will stop seeking
and brackets will be displayed around TRAF. If no
station is found that broadcasts traffic announcements,
NO TRAFFIC will appear on the display.
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If the brackets are on the display and TRAF is not,
press the TRAF button to remove the brackets or use
the TUNE knob or the SEEK arrows to go to a
station that supports traffic announcements. If no station
is found that broadcasts traffic announcements, NO
TRAFFIC will appear on the display.
The radio will play the traffic announcements even if the
volume is low. The radio will interrupt the play of a
cassette tape or CD if the last tuned station broadcasts
traffic announcements.
This function does not apply to XM™ Satellite Radio
Service.
Radio Messages
CALIBRATE: The audio system has been calibrated for
your vehicle from the factory. If CALIBRATE appears
on the display, it means that the radio has not been
configured properly for the vehicle and must be returned
to your GM dealer for service.