GMC 2010 Sierra - Manual (Page 29)

AUTO (Automatic Four-Wheel Drive): This setting is
ideal for use when road surface traction conditions are
variable.
4
m
(Four-Wheel High): Use the Four-Wheel-Drive High
position when extra traction is needed, such as on
snowy or icy roads or in most off-road situations.
N (Neutral): Shift the transfer case to Neutral only when
towing the vehicle. See Recreational Vehicle Towing on
page 5‑49 or Towing a Trailer on page 5‑55.
4
n
(Four-Wheel-Drive Low): This setting sends
maximum power to all four wheels. You might choose
Four-Wheel-Drive Low if you are driving off-road in
deep sand, deep mud, deep snow, and while climbing
or descending steep hills.
See Four-Wheel Drive on page 3‑39.
Vehicle Features
Radio(s)
Radio with CD, DVD, and USB Port
O
: Press to turn the system on and off. Turn to
increase or decrease the volume.
BAND: Press to choose between FM, AM, or XM™,
if equipped.
1-23