GMC SIERRA 1994 Manual page 89

5 . Remove the key and take it with you. If you can walk away from your
vehicle with the ignition key in your hand, your vehicle is in "P"
(Park).
Leaving Your Vehic/e With the Engine Running
(Automatic Transmission Models Only)
If you have to leave your vehicle with the engine running, be sure your
vehicle is in "P" (Park) and your parking brake is firmly set before you
leave
it.
If you have four-wheel drive with a manual transfer case shift
lever, be sure that the transfer case is in a drive gear
-
not in "N" (Neutral).
After you've moved the shift lever into the
" P '
(Park) position, 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 wasn't fully locked into "P" (Park).
Torque Lock (Automatic Transmission)
If you are parking on a hill and you don't 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's seat. To find out how, see "Shifting Into 'P' (Park)" in the
Index.
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 transmission, so
you can pull the shift lever out of
" P '
(Park).
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