GMC Sierra 2015 Owner's Manual page 184

Auto Volume
This feature adjusts the volume
based on vehicle speed and
ambient noise.
Select Off, Low, Medium-Low,
Medium, Medium-High, or High.
Maximum Startup Volume
This feature sets the maximum
startup volume. If the vehicle is
started and the volume is greater
than this level, the volume is
adjusted to this level. To set the
maximum startup volume, turn the
MENU knob or press + or
increase or decrease.
Audio Cue Volume
This feature sets the volume of
audio files played at system startup
and shutdown.
Select On, then press + or
increase or decrease the volume.
Vehicle
Select and the following may
display:
Climate and Air Quality
Collision/Detection Systems
Comfort and Convenience
Lighting
Power Door Locks
Remote Lock, Unlock, Start
Climate and Air Quality
Select and the following may
to
display:
Auto Fan Max Speed
Auto Fan Max Speed
This feature will set the maximum
auto fan speed.
Select Low, Medium, or High.
to
Instruments and Controls
Collision/Detection Systems
Select and the following may
display:
Alert Type
Park Assist
Alert Type
This feature will set crash alerts to
beeps or seat vibrations. This
setting affects all crash alerts
including Forward Collision, Lane
Departure Warning, and Parking
Assist alerts.
Select Beeps or Safety Alert Seat.
Park Assist
If equipped, this feature can assist
in backing up and parking the
vehicle. See Assistance Systems for
Parking or Backing on page 9-56.
Select Off, On, or On with Towbar.
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