GMC Sierra 2014 Owner's Manual page 204

7-4 Infotainment System
1. (Favorite Pages)
Press to scroll down
through the favorite pages
for each source.
2. Favorites/Soft Keys
Press to select favorite
stations.
Press and hold to save
favorite stations.
Press to select a screen
button when displayed.
Radio with TONE
3. (Favorite Pages)
Press to scroll up through
the favorite pages for each
source.
4. (Power/Volume)
Press to turn the audio on.
Press and hold to turn it off.
When on, press to mute the
system. Press again to
unmute.
Turn to increase or
decrease the volume.
5. MEDIA
Press to change the audio
source between CD, USB,
SD card, and AUX.
6. RADIO
Press to change the audio
source between AM, FM,
or SiriusXM, if equipped.
7. or (Seek)
Press to seek the
beginning of the current or
previous track. If the track
has played for less than
five seconds, it seeks the
previous track. If longer
than five seconds, the
current track will start from
the beginning.
Press and hold
quickly reverse through a
track. Release the button to
return to playing speed.
to