Chevrolet 2000 Lumina, Owner'S Manual, Page: 80 / 322

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Ignition Positions
With the ignition key in the ignition switch, you can turn
the switch to five positions.
ACC (A): The accessory position lets you use things
like the radio and windshield wipers when the engine is
off. To use ACC, push in the key and turn it toward you.
Your steering wheel will stay locked.
LOCK (B): Before you put the key into the ignition
switch, the switch is in LOCK. 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. 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 OFF, LOCK or ACC and
the key is in the ignition.