
Black plate (33,1)
Chevrolet Silverado 2500HD and 3500HD Owner Manual (GMNA-Localizing-
U.S./Canada-7142528) - 2014 - crc - 3/26/13
Driving and Operating
9-33
Hydra-Matic
®
4-Speed Automatic
Transmission
Heavy Duty 6-Speed Automatic
Transmission Shown (Light Duty
6-Speed Similar)
See
“
Range Selection Mode
”
under
P (Park):
This position locks the
rear wheels. It is the best position to
use when starting the engine
because the vehicle cannot move
easily. When parked on a hill,
especially when the vehicle has a
heavy load, you might notice an
increase in the effort to shift out of
P (Park). See
“
Torque Lock
”
under
Shifting Into Park on page 9-28
for
more information.
{
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
and
Characteristics and Towing Tips
on page 9-73
{
Warning
If you have four-wheel drive, the
vehicle will be free to roll
—
even
if the shift lever is in P (Park)
—
if
the transfer case is in N (Neutral).
So, be sure the transfer case is in
a drive gear, Two-Wheel Drive
High or Four-Wheel Drive High or
Four-Wheel Drive Low
—
not in
N (Neutral). See
.
R (Reverse):
Use this gear to
back up.
Notice:
Shifting to R (Reverse)
while the vehicle is moving
forward could damage the
transmission. The repairs would
not be covered by the vehicle
warranty. Shift to R (Reverse) only
after the vehicle is stopped.
To rock the vehicle back and forth to
get out of snow, ice, or sand without
damaging the transmission, see
the Vehicle Is Stuck on page 9-13
.