GMC Sierra 2018 Owner's Manual page 188

1. Touch MENU from a source
screen.
2. Select Auto Volume.
3. Select the desired setting.
3
4. Touch to go back to the
source screen.
Tone Settings
The tone settings can be set for
each radio band and each audio
player source.
Preset Tone Settings
Touch MENU.
Touch Tone Settings.
Select a preset tone setting.
Bass, Midrange, or Treble:
Touch or +.
Fader or Balance: Adjust the
front/rear or left/right speakers
by dragging the dot in the
vehicle image on the screen.
Custom Tone Settings
Touch MENU.
Touch Tone Settings.
Touch Custom.
Bass, Midrange, or Treble:
Touch or +.
Fader or Balance: Adjust the
front/rear or left/right speakers
by dragging the dot in the
vehicle image on the screen.
3
Touch to go back to the source
screen.
Selecting an Auxiliary Device
Connect the auxiliary device to the
AUX input terminal. Play will begin
when the system has finished
reading the information on the
device.
If the AUX device is already
connected, press , AUDIO,
Source, then select the device.
Selecting a Station
Seek Tuning
If the radio station is not known:
Press or to automatically
search for available radio stations.
Infotainment System
Manual Tuning
Continue touching or
manually change the radio station.
Direct Tune
From the AM or FM menu:
Touch Tune.
Enter the station number.
Touch Go or or
the previous or next station.
Favorite
Touch or to scroll through
the favorites.
Touch on the station to select it.
Station List
From the AM or FM menu,
touch MENU.
Select Station List.
Touch or to scroll through
the list. Touch the station to
select it.
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