Chevrolet 2003 Silverado 1500 Pickup Owner's Manual page 114

If you have L d r - wheel drive, your vehicle will
be free to roll
-
even if your shift lever is
in
PARK (P)
-
if your transfer case is in NEUTRAL.
So, be sure the transfer case is in a drive gear,
two-wheel high (2H) or four- wheel high (4H) or
four-wheel low (4L)
-
not in NEUTRAL. See
"Shifting into Park (P)" in the index.
REVERSE (R): Use this gear to back up. If your vehicle
is equipped with the Allison Transmission, the R may
blink on the PRNDL if the shift inhibitor is active.
Notice: Shifting to REVERSE (R) while your vehicle
is moving forward could damage your transmission.
Shift to REVERSE (R) only after your vehicle is
stopped.
To rock your vehicle back and forth to get out of snow,
ice or sand without damaging your transmission,
see If You Are Stuck: In Sand, Mud, Ice or Snow on
page
4-50.
NEUTRAL (N): In this position, your engine doesn't
connect with the wheels. To restart when you're already
moving, use NEUTRAL (N) only. Also, use
NEUTRAL (N) when your vehicle is being towed.
Shifting into a drive gear while your engine is
"racing" (running at high speed) is dangerous.
Unless your foot is firmly on the brake pedal,
your vehicle could move very rapidly. You
could lose control and hit people or objects.
Don't shift into a drive gear while your engine
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.
DRIVE (D): This position is for normal driving. If
you need more power for passing, and you're:
Going less than about 35 mph (55 km/h), push your
Going about 35 mph (55 km/h) or more, push the
You'll shift down to the next gear and have more power.
accelerator pedal about halfway down.
accelerator all the way down.
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