Chevrolet Silverado 4500HD/5500HD/6500HD Owner Manual (GMNA-
Localizing-U.S.-12102101) - 2019 - crc - 10/2/18
In Brief
19
Manual Locking Hubs
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Warning
It is dangerous to get out of the
vehicle if the shift lever is not fully
in P (Park) with the parking brake
firmly set. The vehicle can roll.
Do not leave the vehicle when the
engine is running. If you have left
the engine running, the vehicle
can move suddenly. You or others
could be injured. To be sure the
vehicle will not move, even when
you are on fairly level ground,
always set the parking brake and
move the shift lever to P (Park).
See
.
The locking hubs are located on
each end of the front axle and must
be manually turned to LOCK before
the four-wheel drive modes can
be used.
The hubs may remain in the LOCK
position when road surface traction
conditions are variable or it is
unsafe to unlock them. Turn the
locking hubs to FREE when it is
safe to do so.
When four-wheel drive is no longer
needed turn the locking hubs
to FREE.
Transfer Case Controls
Use these controls to shift into and
out of the different four-wheel drive
modes.
Electronic Transfer Case
This transfer case knob is to the left
of the steering column.
The different drive options that may
be available are described following.
N (Neutral) :
Use only when the
vehicle needs to be towed.
2
m
(Two-Wheel Drive High) :
This
setting is used for driving in most
street and highway situations.