This manual covers the GM V8 496 CID 8.1L Marine Engine, manufactured between 1998 and 2006. Designed for marine propulsion, this powerful V8 engine offers robust performance and reliability. Its engineering quality ensures efficient operation and longevity in demanding aquatic environments. This comprehensive repair manual provides detailed guidance for owners, mechanics, and technicians. It encompasses essential information on general operation, routine maintenance, engine removal and installation, fuel systems, lubrication and cooling, engine specifications, transmission, drive chains and sprockets, steering systems, shocks, body work, intake and exhaust, electrical systems, and advanced troubleshooting. Following the procedures outlined in this manual will help ensure the optimal performance and longevity of your marine engine.