Leaving Your Vehicle With The Engine Running - Buick 1995 Century Owner's Manual

Move the lever up as far as it will go.
3. Move
the ignition key to LOCK.
4. 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 PARK (P).
Leaving Your Vehicle With the Engine
Running
If you have
to
leave your 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 the PARK (P)
position, hold the regular brake pedal down. Then, see if
you can move the shift lever away from PARK (P)
without first pulling it toward you. If you can, it means
that the shift lever wasn't fully locked into PARK (P).
Note: If for some reason you leave your vehicle running
and it is not in PARK (P) and the parking brake is
applied, your doors will automatically lock when you
close the door.
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