2003 Chevrolet Impala Owner's Manual - Page 88

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. Retained Accessory Power (RAP) With Retained Accessory Power (RAP), your power windows, audio system and sunroof (option) will continue to work for up to 10 minutes after the ignition is turned to OFF and none of the doors is opened. 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. Starting Your Engine Move your shift lever to PARK (P) or NEUTRAL (N). Your engine won't start in any other position - that's a safety feature. To restart when you're already moving, use NEUTRAL (N) only. START: This position starts the engine. When the engine starts, release the key. The ignition switch will return to ON for normal driving. When the engine is not running, ACC and ON allow you to operate your electrical accessories, such as the radio. A warning chime will sound if you open the driver's door while the ignition is in OFF or ACC and the key is in the iunition. Notices Don't try to shift to PARK (P) if your vehicle is moving. If you do, you couid damage the transaxle. Shift to PARK (P) only when your vehicle is stopped. 2-19