GMC Sierra 2015 Owner's Manual page 307

9-40 Driving and Operating
Shifting into 4 will turn Traction
®
Control and StabiliTrak
Traction Control/Electronic Stability
Control on page 9-50.
Manual Transfer Case
Move the lever to shift into and out
of four-wheel drive.
An indicator light comes on when
four-wheel drive is engaged. See
off. See
Four-Wheel-Drive Light on
page 5-25.
N (Neutral): Use only when the
vehicle needs to be towed. See
Recreational Vehicle Towing on
page 10-94 or Towing the Vehicle
on page 10-94.
2 (Two-Wheel Drive High): Use
this setting for driving on most
streets and highways. The front axle
is not engaged. This setting
provides the best fuel economy.
4 (Four-Wheel Drive Low): This
setting also engages the front axle
and delivers extra torque. Choose
4 if driving off-road in deep sand,
deep mud, or deep snow, and while
climbing or descending steep hills.
When engaged, keep vehicle speed
below 72 km/h (45 mph).
4 (Four-Wheel Drive High): Use
this setting when extra traction is
needed. The front axle engages and
helps when driving on snowy or icy
roads, when off-roading, or when
plowing snow.
The vehicle can be shifted between
2 and 4 while the vehicle is
moving. In extremely cold weather,
it may be necessary to stop or slow
the vehicle to shift into 4 .
Using the Manual Transfer Case
Use quick motions to shift into or
out of 4 or N (Neutral).
Shifting may be harder when the
vehicle is cold, but will return to
normal once warmed up.
Four-wheel drive reduces fuel
economy.
Shifting from 2 to 4
Shifts can be made at any
vehicle speed.
Shift in one continuous motion.