Search by number: 1987 GMC G Series Vans 4.3L 6 Cyl Alternator ProAmp 7273-12 $95.00 each OPTIONS: Standard 66 Amp ProAmp 8165-11 $98.00 each OPTIONS: Optional 100 Amp 6-Groove Pulley ProAmp 7294-12 $112.00 each OPTIONS: Optional 94 Amp ProAmp 7127HO110PFC $197.00 each OPTIONS: Custom Built; 110 Amps; 15.1V; 1 Groove billet pulley & fan ProAmp 7127HO110 $214.00 each OPTIONS: Custom Built; 110 Amps; 15.1V; Replaces stock alternator with stock wiring ProAmpN 7294-12N $121.00 each OPTIONS: Optional 94 Amp ProAmpN 8165-11N $123.00 each OPTIONS: Optional 100 Amp 6-Groove Pulley ProAmp 7921-11 Call for Price OPTIONS: Standard 85 Amp 4-Groove Pulley 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