GMC 2009 Sierra - Manual (Page 256)

PROG (Program): Press this button to go to the
next preset radio station or channel set on the main
radio. This function is inactive, with some radios, if the
front seat passengers are listening to the radio.
When a CD or DVD audio disc is playing, press this
button to go to the beginning of the CD or DVD audio.
This function is inactive, with some radios, if the
front seat passengers are listening to the disc.
When a disc is playing in the CD or DVD changer,
press this button to select the next disc, if multiple discs
are loaded. This function is inactive, with some radios,
if the front seat passengers are listening to the disc.
When a DVD video menu is being displayed, press the
PROG button to perform the menu function, enter.
Theft-Deterrent Feature
THEFTLOCK ® is designed to discourage theft of your
vehicle’s radio. The feature works automatically by
learning a portion of the Vehicle Identification Number
(VIN). If the radio is moved to a different vehicle, it does
not operate and LOC, LOCK, or LOCKED could display.
With THEFTLOCK ® activated, the radio does not
operate if stolen.
Audio Steering Wheel Controls
Vehicles with audio
steering wheel controls
could differ depending on
your vehicle’s options.
Some audio controls can
be adjusted at the steering
wheel. They include the
following:
xw
(Next/Previous): Press the down or up arrow to
go to the next or to the previous radio station stored
as a favorite.
When a CD/DVD is playing, press the down or up arrow
to go to the next or to the previous track or chapter.
g
(Mute/Voice Recognition): Press and release this
button to silence the vehicle speakers only. The audio
of the wireless and wired headphones, if your vehicle
has these features, does not mute. Press and release
this button again, to turn the sound on.
3-120