Search by number: 2005 GMC Full Size Pickups 6.0L 8 Cyl Alternator ProAmp 8247 $114.00 each OPTIONS: Delco Unit 105 Amp ProAmp 8292 $153.00 each OPTIONS: 4 Pin Regulator Plug; Delco unit 145 Amps ProAmp 8302 $155.00 each OPTIONS: 2 Pin; S6; 145 Amps ProAmp 11075 $165.00 each OPTIONS: 2 Pin Regulator Plug; Bosch unit; 150 Amps ProAmpN 8247N $119.00 each OPTIONS: Delco Unit 105 Amp ProAmpN 8292N $163.00 each OPTIONS: 4 Pin Regulator Plug; Delco unit 145 Amps ProAmpN 8302N $172.00 each OPTIONS: 2 Pin; S6; 145 Amps ProAmpN 11075N $207.00 each OPTIONS: 2 Pin Regulator Plug; Bosch unit; 150 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