Shifting Out Of Park - GMC 2009 Yukon XL Owner's Manual

If you have to leave the vehicle with the engine running,
be sure your vehicle is in P (Park) and the parking
brake is firmly set before you leave it. After you move
the shift lever into P (Park), hold the regular brake pedal
down. Then, see if you can move the shift lever away
from P (Park) without first pulling it toward you. If
you can, it means that the shift lever was not fully locked
into P (Park).
Torque Lock
If you are parking on a hill and you do not shift your
transmission into P (Park) properly, the weight of
the vehicle may put too much force on the parking pawl
in the transmission. You may find it difficult to pull the
shift lever out of P (Park). This is called torque lock. To
prevent torque lock, set the parking brake and then
shift into P (Park) properly before you leave the driver
seat. To find out how, see Shifting Into Park on
page 2-44.
When you are ready to drive, move the shift lever out of
P (Park) before you release the parking brake.
If torque lock does occur, you may need to have another
vehicle push yours a little uphill to take some of the
pressure from the parking pawl in the transmission, then
you will be able to pull the shift lever out of P (Park).

Shifting Out of Park

This vehicle is equipped with an electronic shift lock
release system. The shift lock release is designed to:
•
Prevent ignition key removal unless the shift
lever is in P (Park) with the shift lever button fully
released, and
•
Prevent movement of the shift lever out of P (Park),
unless the ignition is in ON/RUN or
ACC/ACCESSORY and the regular brake pedal is
applied.
The shift lock release is always functional except in the
case of an uncharged or low voltage (less than 9 volt)
battery.
If the vehicle has an uncharged battery or a battery with
low voltage, try charging or jump starting the battery.
See Jump Starting on page 5-44 for more information.
2-45