GMC Sierra Classic 2007 Owner's Manual page 319

RDS Messages
INFO (Information): If the current station has a
message, INFO appears on the display. Press this
button to see the message. The message may
display the artist, song title, call in phone
numbers, etc.
If the entire message is not displayed, parts of the
message appears every three seconds. To scroll
through the message, press and release the INFO
button. A new group of words appear on the display
after every press of this button. Once the complete
message has displayed, INFO disappears 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.
Radio Messages
CAL ERR (Calibration Error): The audio system
has been calibrated for your vehicle from the
factory. If CAL ERR appears on the display, it
means that the radio has not been configured
properly for the vehicle and must be returned to
your dealer for service.
LOCKED: This message is displayed when the
®
THEFTLOCK system has locked up. Take
the 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 327 later in this
section for further detail.
Playing a CD
If the ignition or radio is turned off, with a CD in
the player, it will stay in the player. When the
ignition or radio is turned on, the CD starts playing
where it stopped, if it was the last selected
audio source.
When a CD is inserted, the CD symbol appears
on the display. As each new track starts to
play, the track number appears on the display.
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