This manual covers the 2002 Hummer Commercial, a heavy-duty off-road utility vehicle with a heritage rooted in the HMMWV platform. Renowned for its robust construction and extreme off-road capability, this vehicle was designed for demanding applications, featuring powerful diesel engine options and a central tire inflation system. Its unique selling points lie in its unparalleled ability to traverse challenging terrain, high ground clearance, and exceptional durability, making it a specialized choice for utility and industrial needs where conventional vehicles would fail.

This comprehensive Workshop Service Manual provides detailed guidance for the maintenance, diagnosis, and repair of the 2002 Hummer Commercial. It covers all major systems, including the engine, transmission, drivetrain, suspension, brakes, steering, and electrical systems, with step-by-step instructions for procedures ranging from routine maintenance and fluid changes to complete component overhauls. The manual also includes essential troubleshooting guides, diagnostic information, wiring diagrams, and specifications, serving as an indispensable resource for owners, mechanics, and technicians to ensure the optimal performance and longevity of this specialized vehicle.