Search by number: 2003 Chevrolet Malibu 3.1L 6 Cyl Alternator ProAmp 8279 $83.00 each OPTIONS: 1st Prod Delco Unit ProAmp 13989 $110.00 each OPTIONS: 2nd Prod Bosch Unit ProAmpN 13989N $234.00 each OPTIONS: 2nd Prod Bosch Unit 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