2007 Chevrolet Impala Owner's Manual - Page 112

Ignition Positions With the ignition key in the ignition, the key can be turned to four different positions: A (OFF): This is the only position in which the ignition key can be inserted or removed. This position locks the ignition and transaxle. It is a theft-deterrent feature. B (ACCESSORY): This position lets the radio and windshield wipers operate while the engine is off. To use ACCESSORY, turn the key clockwise. C (RUN): This position is where the key returns to after the vehicle is started. This position displays some of the warning and indicator lights. The battery could be drained if you leave the key in the ACCESSORY or 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. D (START): This position starts the engine. 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 in all the way. If none of this works, then your vehicle needs service. A warning chime will sound and the Driver Information Center (DIC) will display DRIVER DOOR OPEN when the driver's door is opened if the ignition is in OFF, ACCESSORY and the key is in the ignition. See DIC Warnings and Messages on page 197 for more information. 112