Search by number: 2012 Chevrolet Silverado 1500 5.3L 8 Cyl Alternator ProAmp 8550 $149.00 each OPTIONS: Delco Remy type unit 145 Amps 6 Groove Serpentine Belt Late DR37 ProAmp 8301 $154.00 each OPTIONS: 2 Pin; 160 Amps ProAmpN 8301N $182.00 each OPTIONS: 2 Pin; 160 Amps 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