GMC 2012 Sierra Denali Owner's Manual page 232

7-50 Infotainment System
C. Left side 3.5 mm (1/8 in)
headphone auxiliary jack.
D. Right side 3.5 mm (1/8 in)
headphone auxiliary jack.
P
(Power): Press this button to
turn the RSA on or off.
Volume: Turn this knob to increase
or to decrease the volume. The left
knob controls the left headphones
and the right knob controls the right
headphones.
SRCE (Source): Press this button
to switch between the radio (AM/
FM), XM (if equipped), CD, and if
the vehicle has these features,
DVD, front auxiliary, and rear
auxiliary.
or (Seek): When listening to
FM, AM, or XM (if equipped),
press either seek arrow to go to the
previous or to the next station or
channels and stay there. This
function is inactive, with some
radios, if the front seat passengers
are listening to the radio.
Press and hold either seek arrow
until the display flashes, to tune to
an individual station. The display
stops flashing after the buttons have
not been pushed for more than
two seconds. This function is
inactive, with some radios, if the
front seat passengers are listening
to the radio.
While listening to a disc, press the
left seek arrow to go back to the
start of the current track or chapter
(if more than ten seconds have
played). Press the right seek arrow
to go to the next track or chapter on
the disc. 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 either seek arrow
to perform a cursor up or down on
the menu. Hold either seek arrow to
perform a cursor left or right on
the menu.
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.