Oldsmobile cutlass supreme 1996 Owner's Manual page 71

LOCK
(B):
Before you put the key into the ignition
switch, the switch is in the LOCK position. It's also the
only position in which you can remove your key. This
position locks your ignition, steering wheel and
transaxle. It's a theft-deterrent feature.
OFF (C):
This position lets you turn off the engine but
still turn the steering wheel. It doesn't lock the steering
wheel like LOCK. Use OFF if you must have your
vehicle pushed or towed.
RUN (D): This position is where the key returns after
you start your vehicle. With the engine off, you can
use RUN to display some of your warning and
indicator lights.
START (E):
This position starts your engine.
A warning chime will sound if you open the driver's
door when the ignition is in the OFF, LOCK or ACC
position and the key is in the ignition.
NOTICE:
If your key seems stuck i n LOCK and you can't
,
turn it, be sure it is all the way in. If it is, then
turn the steering wheel left and right while you
turn the key hard. But turn the key only with
your hand. Using a tool to force it could break
the key or the ignition switch. If none of this
works, then your vehicle needs service.