Automatic Transmission Operation - GMC 2007 Yukon Denali Owner's Manual

Automatic Transmission Operation

Your vehicle has an Hydra-Matic
automatic transmission, and has an electronic
shift position indicator within the instrument panel
cluster. The electronic shift position indicator
displays when the shift lever is moved out
of PARK (P).
There are several different positions for the
shift lever.
See "Driver Shift Control (DSC)" later in this
section.
PARK (P): This position locks your rear wheels. It
is the best position to use when you start your
engine because your vehicle cannot move easily.
When parked on a hill, especially when the
vehicle has a heavy load, you may notice an
increase in the effort to shift out of Park.
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6L80
See Torque Lock (Automatic Transmission) under
Shifting Into Park (P) on page 152 for more
information.
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 152.
If you are pulling a trailer, see Towing a
Trailer on page 402.
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