Search by number: 1991 GMC Full Size Pickups 5.7L 8 Cyl Alternator ProAmp 7802-3 $93.00 each OPTIONS: RV3 Models - Standard ProAmp 8165-7 $105.00 each OPTIONS: w/AC 105 Amp Exc RV3 Models ProAmp 7901-2 $137.00 each OPTIONS: Optional 124 Amp ProAmpN 8165-7N $98.00 each OPTIONS: w/AC 105 Amp Exc RV3 Models ProAmpN 7802-3N $123.00 each OPTIONS: RV3 Models - Standard ProAmpN 7901-2N $209.00 each OPTIONS: Optional 124 Amp ProAmp 7921-7 Call for Price OPTIONS: wo/AC 85 Amp Exc RV3 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