Search by number: 2002 Chevrolet Impala 3.4L 6 Cyl Alternator ProAmp 8287 $116.00 each OPTIONS: OE # 10442782 AD230 Alt ProAmpN 8287N $188.00 each OPTIONS: OE # 10442782 AD230 Alt Why is there more than one unit for my car? Look at the TECH SPECS when more than one unit is shown for your car. AMPS (ELECTRIC CAPACITY): must match you vehicle electric requirements. *** Call us if you are looking to increase your unit capacity! OE ALTERNATOR MANUFACTURER: It is recommended to match the Make of your alternator