Torque Lock; Leaving Your Vehicle With The Engine Running - Oldsmobile 2004 Alero Owner's Manual

Leaving Your Vehicle With the Engine
Running
CAUTION:
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It can be dangerous to leave your vehicle with
the engine running. Your vehicle could move
suddenly if the shift lever is not fully in
PARK (P) with the parking brake firmly set.
And, if you leave the vehicle with the engine
running, it could overheat and even catch fire.
You or others could be injured. Do not leave
your vehicle with the engine running.
If you have to leave your automatic transaxle model
vehicle with the engine running, be sure your vehicle is
in PARK (P) and your parking brake is firmly set
before you leave it. After you've moved the shift lever
into PARK (P), hold the regular brake pedal down. Then,
see if you can move the shift lever away from PARK (P)
without first pushing the button.
If you can, it means that the shift lever wasn't fully
locked into PARK (P).

Torque Lock

If you are parking on a hill and you don't shift your
automatic transaxle into PARK (P) properly, the weight of
the vehicle may put too much force on the parking pawl in
the transaxle. You may find it difficult to pull the shift lever
out of PARK (P). This is called "torque lock." To prevent
torque lock, set the parking brake and then shift into
PARK (P) properly before you leave the driver's seat. To
find out how, see Shifting Into Park (P) on page 2-28.
When you are ready to drive, move the shift lever out of
PARK (P) before you release the parking brake.
If torque lock does occur, you may need to have another
vehicle push your vehicle a little uphill to take some of
the pressure from the parking pawl in the transaxle,
so you can pull the shift lever out of PARK (P).
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