Ignition Positions - Hummer 2003 H2 Owner's Manual

Ignition Positions

With your key in the ignition switch you can turn it to
four different positions.
A (LOCK): This position locks your ignition and
-
transmission. It's a theft deterrent feature. You will
only be able to remove your key when the ignition is
turned to LOCK.
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NOTICE:
If your key seems stuck in LOCK and you can't
turn it, be sure you are using the correct key;
if so, is it all the way in? 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.
B (ACCESSORY): This position lets you use things
like the radio, power windows and the windshield
wipers when the engine is off.
C (RUN): This position is for driving.
D (START): This position starts your engine.
Retained Accessory Power (RAP)
The Retained Accessory Power (RAP) feature will allow
certain features on your vehicle to continue to work up
to 10 minutes after the ignition is turned to LOCK.