This manual covers the Hummer H1 / Humvee Commercial models from the 1997 and 1998 model years. As a civilian derivative of the formidable military HMMWV, the Hummer H1 is renowned for its exceptional off-road capabilities, robust construction, and distinctive design. It was engineered for extreme durability and performance in challenging environments, featuring a powerful diesel engine, full-time four-wheel drive, and significant ground clearance. This first-generation model, produced by AM General before the GM acquisition, offers unparalleled utility and a unique presence, making it a standout in the realm of rugged vehicles.

The purpose of this comprehensive repair service manual is to provide detailed guidance for the maintenance, diagnosis, and repair of all major systems within the 1997-1998 Hummer Commercial variants. It covers essential areas including the powertrain, transmission and drivetrain, chassis and suspension, braking system, electrical system, and HVAC. Included are step-by-step repair instructions, scheduled maintenance procedures, troubleshooting guides for common issues, and technical specifications. This manual is an indispensable resource for professional technicians and advanced enthusiasts seeking to maintain the optimal performance and longevity of their Hummer H1.