This manual covers the Hummer HMMWV (Hummer Commercial) for the 1997 and 1998 model years. Originally developed for military applications, the civilian HMMWV offers exceptional off-road capability, robust construction, and extreme durability. Its design emphasizes ruggedness and performance in challenging environments, featuring a powerful turbocharged diesel engine, a full-time four-wheel-drive system with locking differentials, and a high ground clearance. This vehicle is engineered for demanding use, providing a unique combination of off-road prowess and sheer resilience.

This Workshop Service Manual (WSM) provides comprehensive information for the service, repair, and maintenance of your Hummer HMMWV. It covers all major systems, including the powertrain, chassis, and electrical components, with detailed procedures for diagnostics, troubleshooting, and repair. The manual includes essential technical specifications, fluid requirements, and maintenance schedules. Its in-depth coverage is designed to assist owners, mechanics, and technicians in keeping the vehicle in optimal condition, ensuring its legendary performance and reliability are maintained.