GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - crc - 5/11/17
262
Driving and Operating
Drive Systems
Four-Wheel Drive
If equipped, four-wheel drive
engages the front axle for extra
traction.
Read the appropriate section for
transfer case operation before
using.
Caution
Do not drive on clean, dry
pavement in 4
m
and 4
n
(if
equipped) for an extended period
of time. These conditions may
cause premature wear on the
vehicle
’
s powertrain.
Driving on clean, dry pavement in 4
m
or 4
n
may:
.
Cause a vibration to be felt in
the steering system.
.
Cause tires to wear faster.
.
Make the transfer case harder to
shift, and cause it to run noisier.
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Warning
If equipped with four-wheel drive,
the vehicle will be free to roll if the
transfer case is in N (Neutral),
even when the shift lever is in
P (Park). You or someone else
could be seriously injured. Be
sure the transfer case is in a drive
gear
—
2
m
, 4
m
, or 4
n
or set the
parking brake before placing the
transfer case in N (Neutral)
N (Neutral). See
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
Manual Transfer Case
Move the lever to shift into and out
of four-wheel drive.