Ignition Positions - GMC Sierra Classic 2007 Owner's Manual

Ignition Positions

With the key in the ignition switch, you can turn it
to four different positions.
Notice: Using a tool to force the key from the
ignition switch could cause damage or
break the key. Use the correct key and turn the
key only with your hand. Make sure the key
is all the way in. If it is, turn the steering wheel
left and right while you turn the key hard. If
none of this works, then your vehicle needs
service.
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A (LOCK): This position locks your ignition when
the key is removed. The steering locks when
equipped with a manual transmission. It is
a theft-deterrent feature. You will only be able to
remove your key when the ignition is turned
to LOCK.
B (ACCESSORY): This position allows you to use
things like the radio, power windows and the
windshield wipers when the engine is off.
CAUTION:
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On manual transmission vehicles, turning
the key to LOCK will lock the steering
column and result in a loss of ability to
steer the vehicle. This could cause a
collision. If you need to turn the engine off
while the vehicle is moving, turn the key
only to ACCESSORY. Do not press the key
release button while the vehicle is moving.