Description:

Replaces Part Number: 12556893, 12558693, 12570553, 3859078, 38590782, 392889925, D581,UF271.. Fit for Chevrolet Avalanche 1500 2500, Express 2500 3500, Monte Carlo, Silverado 1500 2500 3500, Sonora, SSR, Suburban 1500, Tahoe, Trailblazer.. Fit for GMC Sierra1500 2500 3500, Envoy, Savana 1500 2500 3500, Yukon XL 1500 2500.. Fit for Mercruiser &Workhorse.. Material: Germany Material Coils and Japan epoxy and spark plus wires(total length 11.4 inches). Improved Throttle Response, Improved Gas Mileage, Reduces Misfire..