Ignition Positions - GMC Sierra 2005 Owner's Manual

Ignition Positions

With the key in the ignition switch, you can turn it to
four different positions.
Notice: If your key seems stuck in LOCK and you
cannot turn it, be sure you are using the correct
key; if so, is it all the way in? If it is, then turn the
steering wheel left and right while you turn the
key hard. Turn the key only with your hand. Using a
tool to force it could break the key or the ignition
switch. If none of these work, then your vehicle
needs service.
2-22
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:
{
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.
C (Run): This is the position for driving.
D (Start): This position starts your engine.