Chevrolet 1995 Blazer Owner's Manual page 73

NOTICE:
Damage to your transmission caused by shifting out of PARK
(P) or NEUTRAL (N) with the engine racing isn't covered by
your warranty.
OVERDRIVE (0) - This position is for normal driving.
If
you need
more power for passing, and you're:
pedal about halfway down.
- Going less than about 35 mph (56
km/h),
push your accelerator
-
Going about 35 mph (56 k d h ) or more, push the accelerator all
the way down.
You'll shift down
to
the next gear and have more power.
OVERDRIVE
(a)
should
not
be used when towing
a
trailer,
carrying
a
heavy load, driving on steep hills, or for off-road
driving. Select DRIVE (D) when operating the vehicle under any
of these conditions.
0
DRIVE (D) - This is like @, but you never go into Overdrive. You
should use DRIVE (D) when towing a trailer, carrying a
heavy load,
driving on steep hills, or for off-road driving.
SECOND GEAR (2) - This position gives you more power but lower
fuel economy. You can use SECOND GEAR (2) on hills. It can help
control your speed as you go down steep mountain roads, but then you
would also want to use your brakes off and on.
If you manually select SECOND GEAR (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.
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