2002 Chevrolet Impala Owner's Manual - Page 97

Ignition Positions With the key in the ignition, you can turn the switch to four positions. The ignition switch is located on the instrument panel, to the right of the steering column. NOTICE: If your key seems stuck in OFF 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. ACC (Accessory): This is the position in which you can operate your electrical accessories. With the key in this position, the ignition and automatic transaxle will unlock. OFF: This is the only position from which you can remove the key. Removing the key locks your ignition and automatic transaxle. ON: This is the position to which the switch returns after you start the engine and release the switch. The switch stays in ON when the engine is running. But even when the engine is not running, you can use ON to operate your electrical accessories and to display some instrument panel cluster messages and warning lights. 2-31