Shifting From Two-Wheel Drive High To Four-Wheel Drive High; Shifting In Or Out Of Four-Wheel Drive Low - GMC 2014 Sierra Owner's Manual

Shifts between Two-Wheel Drive
High and Four-Wheel Drive High
can be made at any vehicle
speed.
Shift the transfer case shift lever
in one continuous motion into
either the Four-Wheel Drive High
or Two-Wheel Drive High
position.
Shifting from Two-Wheel Drive
High to Four-Wheel Drive High
while the vehicle is in motion
may require that moderate force
be applied to the shift lever for a
few seconds before Four-Wheel
Drive High can be engaged,
especially in cold weather.
In extremely cold weather, it may
be necessary to slow or stop the
vehicle to shift into Four-Wheel
Drive High.
While in Four-Wheel Drive High,
the vehicle can be driven at any
posted legal speed limit.
Shifting the transfer case into
Four-Wheel Drive Low while
moving at speeds faster than
5 km/h (3 mph) may cause
premature wear to the transfer
case, and may cause the gears to
grind. To avoid causing premature
wear, and grinding the gears, do
not shift the transfer case into
Four-Wheel Drive Low while the
vehicle is moving faster than
5 km/h (3 mph).
Shifting into Four-Wheel Drive
Low should be done, if possible,
with the vehicle at a slight roll,
5 km/h (3 mph) or less.
Shift the transmission into
N (Neutral).
Shift the transfer case shift lever
in one continuous motion into or
out of the Four-Wheel Drive Low
position.
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
.