The 7127SE is a 12v 63 amp delco 10si-type internally regulated alternator, a new aftermarket direct replacement engineered to match the fit, form, and function of the original alternator. Specifications: - Series: 10SI - Voltage: 12V - Output: 63 amp Vehicle Compatibility: - Makes: Chevrolet, GMC, Oldsmobile (1969-1989) - Models include: Chevrolet C30; GMC C7000; Oldsmobile Starfire; Chevrolet El Camino; Chevrolet Malibu; Chevrolet C60 - Confirm exact fitment with your year, make, and model before ordering. Cross-Reference / Interchange Numbers: - Replaces / compatible with: 049757, 10459509, 13-4011S, 1N-4011SW, 20100, 36-7127AC, 36-7127SE, 70-01-7127SE, 7127, 7127-3SE (plus 31 more on file). Why ePartsGlobal: specialist in heavy-duty starters, alternators, and charging-system electrical parts. Backed by a 1-year warranty, free shipping on orders over $19.95, and fast fulfillment. Ships from USA.