Automatic Transmission Operation - Chevrolet Silverado 2004 Owner's Manual

4. Before starting the engine, be sure to unplug and
store the cord as it was before to keep it away
from moving engine parts. If you don't, it could
be damaged.
How long should you keep the coolant heater plugged
in? The answer depends on the outside temperature, the
kind of oil you have, and some other things. Instead
of trying to list everything here, we ask that you contact
your dealer in the area where you'll be parking your
vehicle. The dealer can give you the best advice for that
particular area.

Automatic Transmission Operation

If your vehicle is equipped with an automatic
transmission, it features an electronic shift position
indicator within the instrument panel cluster. This display
must be powered anytime the shift lever is capable of
being moved out of PARK (P). See Fuses and
Circuit Breakers on page 5-123.
There are several different positions for your shift lever.
PARK (P): This position locks your rear wheels. It's the
best position to use when you start your engine
because your vehicle can't move easily. If your vehicle
is equipped with the Allison
PARK (P) for stationary operation of the Power Takeoff
(PTO), if equipped.
CAUTION:
{
It is dangerous to get out of your vehicle if the
shift lever is not fully in PARK (P) with the
parking brake firmly set. Your vehicle can roll.
Do not leave your vehicle when the engine is
running unless you have to. If you have left the
engine running, the vehicle can move
suddenly. You or others could be injured. To
be sure your vehicle will not move, even when
you are on fairly level ground, always set your
parking brake and move the shift lever to
PARK (P). See Shifting Into Park (P) on
page 2-49. If you are pulling a trailer, see
Towing a Trailer on page 4-70.
®
Transmission, use
2-27