GMC 1996 Suburban Owner's Manual page 180

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What should I do if my vehicle stalls, or is about
A:
If
this happens, there are some things you should
to stall, and I can't make it up the hill?
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0
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do, and there are some things you must not do.
First, here's what you should do:
Push the brake pedal to stop the vehicle and
keep it from rolling backwards. Also, apply the
parking brake.
If your engine is still running, shift the transmission
to REVERSE
(R),
release the parking brake, and
slowly back down the hill in REVERSE (R).
If your engine has stopped running, you'll need to
restart it. With the brake pedal depressed and the
parking brake still applied, shift the transmission to
PARK (P) and restart the engine. Then, shift to
REVERSE (R), release the parking brake, and
slowly back down the hill as straight
as
possible in
REVERSE (R).
As
you are backing down the hill, put your left hand
on the steering wheel at the 12 o'clock position. This
way, you'll be able to tell if your wheels are straight
and maneuver as you back down. It's best that you
back down the hill with your wheels straight rather
than in the left or right direction. Turning the wheel
too far to the left or right will increase the possibility
of a rollover.
Here are some things you must not do if you stall, or are
about to stall, when going up a hill.
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Never attempt to prevent a stall by shifting into
NEUTRAL
(N)
to "rev-up" the engine and regain
forward momentum. This won't 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.
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Never attempt to turn around if you are about to stall
when going up a hill. I f the hill is steep enough to
stall your vehicle, it's steep enough to cause you to
roll over
if
you turn around. If you can't make
it
up
the hill, you must back straight down the hill.
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