GMC 1996 Suburban Owner's Manual page 80

AUTOMATIC OVERDRIVE
(0):
This position is
for normal driving. If you need more power fur passing.
and you're:
Going less than about 35 mph (56 km/h), push your
Going about 35 mph (56 km/h) or more, push the
accelerator pedal about halfway down.
accelerator all the way down.
You'll shift down to the next gear and have more power.
AUTOMATIC OVERDRIVE
(@)
can be used when
towing a trailer. You may want to shift the transmission
to THIRD (3) or, if necessary, a lower gear selection if
the transmission shifts too often when carrying a heavy
load, driving on steep hills or for off-road driving.
THIRD (3): This position is also used for normal
driving, however,
it
offers more power and lower fuel
economy than AUTOMATIC OVERDRIVE (0).
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 a s
you go down steep
mountain roads, but then you would also want to use
your brakes off' and on.
If you manually select SECOND (2), the transmission
will drive i n 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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