Automatic Transmission - GMC Yukon XL Denali Owner's Manual

9-28 Driving and Operating
WARNING
It can be dangerous to get out of
the vehicle if the automatic
transmission shift lever is not fully
in P (Park) with the parking brake
firmly set. The vehicle can roll. Do
not leave the 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 the
vehicle will not move, even when
you are on fairly level ground,
always set the parking brake and
move the shift lever to P (Park).
Follow the proper steps to be sure
the vehicle will not move. See
Shifting Into Park on page 9 24.
If parking on a hill and pulling a
trailer, see Driving Characteristics
and Towing Tips on page 9 56.
Automatic
Transmission
If the vehicle is a Hybrid, see the
Hybrid supplement for more
information.
The vehicle has a
®
Hydra-Matic 6L80 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 P (Park).
There are several different positions
for the shift lever.
See Range Selection Mode under
Manual Mode on page 9 30.
P (Park): This position locks the
rear wheels. It is the best position to
use when you start the engine
because the 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 P (Park). See
Torque Lock under Shifting Into
Park on page 9 24 for more
information.
WARNING
It is dangerous to get out of the
vehicle if the shift lever is not fully
in P (Park) with the parking brake
firmly set. The vehicle can roll.
Do not leave the 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 the
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