Search by number: 2006 Pontiac G6 3.9L 6 Cyl Alternator ProAmp 11142 $131.00 each OPTIONS: GTP Models w/AT ProAmp 11143 $174.00 each OPTIONS: GTP Models w/MT ProAmpN 11142N $249.00 each OPTIONS: GTP Models w/AT 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