Search by number: 1997 GMC Full Size Pickups 6.5L 8 Cyl Diesel Alternator ProAmp 8227-5 $61.00 each OPTIONS: Standard 100 Amp 2nd Prod ProAmp 8206-5 $100.00 each OPTIONS: Optional 105 Amps; Oval Plug ProAmp 8203-5 $140.00 each OPTIONS: Optional 124 Amps; Rectangle Plug ProAmpN 8206-5N $138.00 each OPTIONS: Optional 105 Amps; Oval Plug ProAmpN 8227-5N $145.00 each OPTIONS: Standard 100 Amp 2nd Prod ProAmpN 8203-5N $157.00 each OPTIONS: Optional 124 Amps; Rectangle Plug 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