GMC 1996 Sierra Owner's Manual page 78

AUTOMATIC OVERDRIVE (0):
This position is
for normal driving. If you need more power for passing,
and you're:
0
Going less than about 35 mph (56 km/h), push your
accelerator pedal about halfway down.
accelerator all the way down.
0
Going about 35 mph (56 k d h j
or more, push the
You'll shift down to the next gear and have more power.
AUTOMATIC OVERDRIVE (GO)
can be used when
towing a trailer, carrying a heavy load or driving o n
steep hills. You may want to shift the transmission to
THIRD (3) or, if necessary, a lower gear selection if the
transmission shifts too often.
THIRD (3): This position
is also used for normal
driving, however it offers more power and lower fuel
economy than AUTOMATIC OVERDRIVE (68).
SECOND (2): This position gives you more power but
lower fuel economy. You can use SECOND (2) on hills.
It
can help control your speed as you g o down steep
mountain roads, but
then
you would a l s o want to use
your brakes off and on.
If you manually select SECOND (2), the transmission
will
drive
in
second gear. You may use this feature for
reducing torque to the rear wheels when you are
trying to start your vehicle
from
a
stop on slippery
road surfaces.
FIRST (1): This position gives you even more power
(but lower fuel economy) than SECOND (2). You can
use it on very steep hills, or in deep snow or mud. If the
selector lever is put in FIRST ( 1 ) while the vehicle is
moving forward, the transmission won't shift into first
gear until the vehicle is going slowly enough.
NOTICE:
If your rear wheels can't rotate, don't try to
drive. This might happen if you were stuck in
very deep sand or mud or were up against a solid
object. You could damage your transmission.
Also, if you stop when going uphill, don't hold
your vehicle there with only the accelerator
pedal. This could overheat and damage the
transmission. Use your brakes or shift into
PARK
(P)
to hold your vehicle in position
on a hill.
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