Automatic Transmission Operation - GMC Sierra Denali Classic 2007 Owner's Manual

Automatic Transmission Operation

Your vehicle is equipped with an automatic
transmission and features an electronic shift
position indicator located within the instrument
panel cluster.
There are several different positions for your
shift lever.
PARK (P): This position locks your drive wheels. It
is the best position to use when you start your
engine because your vehicle cannot move easily.
CAUTION:
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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 110. If you are pulling a trailer, see
Towing a Trailer on page 304.
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