GM Service Manual Online
For 1990-2009 cars only

Object Number: 1202403  Size: A2

The ignition switch can be turned to four different positions with the key.

To shift out of P (Park), the ignition must be in ON/RUN and the brake pedal must be pressed.

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.

LOCK/OFF: This position locks the steering wheel, ignition, shift lever and transmission. This is the only position in which you can insert or remove the key. If the steering wheel is locked, move it from right to left and turn the key to ACC/ACCESSORY. If none of this works, then your vehicle needs service.

ACC (ACC/ACCESSORY): This position operates some of the electrical accessories, such as the radio, but not the climate control system. Use ACC/ACCESSORY if you must have your vehicle in motion while the engine is off, for example, if your vehicle is being pushed or towed.

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

START: This position starts the engine. When the engine starts, release the key. The switch returns to ON/RUN for normal driving. Do not turn the key to START if the engine is running.

Even if the engine is not running, ACC/ACCESSORY and ON/RUN allow you to operate electrical accessories, such as the radio.

Key In the Ignition

Never leave your vehicle with the keys inside, as it is an easy target for joy riders or thieves. If you leave the key in the ignition and park your vehicle, a chime will sound, when you open the driver's door. Always remember to remove your key from the ignition and take it with you. This will lock your ignition and transmission. Also, always remember to lock the doors.

The battery could be drained if you leave the key in the ignition while your vehicle is parked . You may not be able to start your vehicle after it has been parked for an extended period of time.