Chevrolet Silverado 2004 Owner's Manual page 324

Here are some things you must not do if you stall, or
are about to stall, when going up a hill.
•
Never attempt to prevent a stall by shifting into
NEUTRAL (N) (or pressing the clutch, if you have a
manual transmission) to "rev-up" the engine and
regain forward momentum. This will not work. Your
vehicle will roll backwards very quickly and you
could go out of control.
Instead, apply the regular brake to stop the vehicle.
Then apply the parking brake. Shift to
REVERSE (R), release the parking brake, and
slowly back straight down.
•
Never attempt to turn around if you are about to
stall when going up a hill. If the hill is steep
enough to stall your vehicle, it is steep enough to
cause you to roll over if you turn around. If you can
not make it up the hill, you must back straight
down the hill.
4-30
Q:
Suppose, after stalling, I try to back down the
hill and decide I just cannot do it. What
should I do?
A:
Set the parking brake, put your transmission in
PARK (P), or the manual transmission in FIRST (1),
and turn off the engine. Leave the vehicle and
go get some help. Exit on the uphill side and stay
clear of the path the vehicle would take if it
rolled downhill. Do not shift the transfer case to
NEUTRAL when you leave the vehicle. Leave it in
some gear.
CAUTION:
{
Shifting the transfer case to NEUTRAL can
cause your vehicle to roll even if the
transmission is in PARK (P). This is because
the NEUTRAL position on the transfer case
overrides the transmission. You or someone
else could be injured. If you are going to leave
your vehicle, set the parking brake and shift
the transmission to PARK (P). But do not shift
the transfer case to NEUTRAL.