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GMC 2015 Sierra - Page 303

GMC 2015 Sierra
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GMC 2015i Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
8431499) - 2015 - CRC - 6/20/14
9-40 Driving and Operating
{
Warning
Shifting the transfer case to
N (Neutral) can cause the vehicle
to roll even if the transmission is
in P (Park). You or someone else
could be seriously injured. Be
sure to set the parking brake
before placing the transfer case in
N (Neutral). See Parking Brake on
page 9-48.
{
Caution
Extended high-speed operation in
4
n may damage or shorten the
life of the drivetrain.
Engagement noise and bump when
shifting between 4
n and 4 m or from
N (Neutral), with the engine running,
is normal.
Shifting into 4
n will turn Traction
Control and StabiliTrak
®
off. See
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
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
m (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
n (Four-Wheel Drive Low): This
setting also engages the front axle
and delivers extra torque. Choose
4
n 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
m (Four-Wheel Drive High): Use
this setting when extra traction is
needed. The front axle engages and

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