GM Service Manual Online
For 1990-2009 cars only

Object Number: 1828734  Size: A3

The ignition switch has four different positions.

Press the brake pedal, and turn the ignition to ON/RUN to shift out of P (Park).

Notice: Using a tool to force the key to turn in the ignition could cause damage to the switch or break the key. Use the correct key, make sure it is all the way in, and turn it only with your hand. If the key cannot be turned by hand, see your dealer/retailer.

A (LOCK/OFF) :  This position locks the ignition and transmission. The key can only be removed in LOCK/OFF. The steering can bind with the wheels turned off center. If this happens, move the steering wheel from right to left while turning the key to ACC/ACCESSORY. If this doesn't work, then the vehicle needs service.

B (ACC/ACCESSORY) :  This is the position in which you can operate electrical accessories.

C (ON/RUN) :  This position can be used to operate the electrical accessories and to display some instrument panel warning and indicator lights. The switch stays in this position when the engine is running. If you leave the key in the ACC/ACCESSORY or ON/RUN position with the engine off, the battery could be drained. You may not be able to start the vehicle if the battery is allowed to drain for an extended period of time.

D (START) :  This is the position that starts the engine. When the engine starts, release the key. The ignition switch returns to ON/RUN for driving. A warning tone will sound when the driver door is opened, the ignition is in ACC/ACCESSORY or LOCK/OFF and the key is in the ignition.