Automatic transmission, Automatic, Automatic transmission -46 – GMC 2011 Sierra User Manual

Page 340

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Black plate (46,1)

GMC Sierra Owner Manual - 2011

9-46

Driving and Operating

Automatic
Transmission

If the vehicle is a hybrid, see
the hybrid supplement for more
information.

Vehicles with an automatic
transmission have an electronic
shift position indicator within
the instrument panel cluster.
This display comes on when
the ignition key is turned to
the ON/RUN position.

There are several different positions
for the shift lever.

Hydra-Matic

®

4-Speed Automatic

Transmission

Heavy Duty 6-Speed

Automatic Transmission Shown

(Light Duty 6‐Speed Similar)

See “Range Selection Mode” under
Manual Mode on page 9‑50.

P (Park): This position locks the
rear wheels. It is the best position
to use when starting the engine
because the vehicle cannot move
easily. When parked on a hill,
especially when the vehicle has a
heavy load, you might notice an
increase in the effort to shift out of
P (Park). See “Torque Lock” under
Shifting Into Park on page 9‑41 for
more information.

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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

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