Search by number: 1984 GMC P Series Trucks 7.4L 8 Cyl Alternator ProAmp 7157M $90.00 each OPTIONS: Optional 100 Amp ProAmp 7127-3 $94.00 each OPTIONS: Standard 63 Amps; 1 Groove Pulley ProAmp 7273-3 $95.00 each OPTIONS: Optional wo/AC ProAmp 7135M $112.00 each OPTIONS: Optional 80 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 7127-3N $108.00 each OPTIONS: Standard 63 Amps; 1 Groove Pulley ProAmpN 7157MN $145.00 each OPTIONS: Optional 100 Amp 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