GMC 1999 Sierra 1500 Pickup Owner's Manual page 275

If You're Stuck: In Sand,
Mud, Ice or Snow
What you don't want to do when your vehicle is stuck is to spin your
wheels. The method known as "rocking" can help you get out when you're
stuck, but you must use caution.
CAUTION
-
- -
I *
If you let your tires spin at high speed, they can explode and you
or
, A
others could be injured. And, the transmission
or
other parts of the
vehicle can overheat. That could cause an engine compartment fire
or other damage. When you're stuck, spin the wheels as little as
possible. Don't spin the wheels above 35 mph (55 krnlh) as shown
I
on the speedometer.
;pinning your wheels can destroy parts of your vehicle as well as the
res. If you spin the wheels too fast while shifting your transmission back
.nd forth, you can destroy your transmission.
NOTICE
1
Rocking your vehicle to get it out:
First, turn your steering wheel left and right. That will clear the area around
your front wheels. Then shift back and forth between R and a forward gear
(or
with a manual transmission, between First
or
Second gear and Reverse),
spinning the wheels as little as possible. Release the accelerator pedal while
you shift, and press lightly on the accelerator pedal when the transmission is
in gear. If that doesn't get you out after
a
few tries, you may need to be
towed out.
Or,
you can use your recovery hooks, if your vehicle has them. If
you do need to be towed out, see "Towing Your Vehicle" in the Index.
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