Search by number: 2010 Chevrolet Express 1500 5.3L 8 Cyl Alternator ProAmp 11234 $144.00 each OPTIONS: 2 Pin; Bosch type unit; 125 Amps ProAmp 8550 $147.00 each OPTIONS: 2 Pin Harness. 145 Amps ProAmp 8302 $155.00 each OPTIONS: 2 Pin; S6; Standard 145 Amps ProAmpN 8302N $172.00 each OPTIONS: 2 Pin; S6; Standard 145 Amps ProAmpN 11234N $252.00 each OPTIONS: 2 Pin; Bosch type unit; 125 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