The Hummer H3, produced from 2006 to 2010, is an iconic SUV known for its exceptional off-road capability, robust construction, and distinctive, commanding presence. It was positioned as a rugged and adventurous vehicle, competing with other large SUVs and off-road focused models. Key selling points include its impressive ground clearance, powerful engine options ranging from a 3.7L I5 to a 5.3L V8, and a full-time 4-Wheel Drive system, often featuring a locking rear differential. Its substantial dimensions, including a wheelbase of approximately 119 inches and a width of 84.5 inches, contribute to its imposing stance and stability.

This comprehensive factory service manual provides detailed guidance for the maintenance, repair, and overhaul of the Hummer H3. It covers all imaginable aspects of the vehicle, from routine maintenance procedures such as oil changes and fluid flushes to complex repairs and rebuilds of major components like the engine, transmission, and suspension systems. The manual includes in-depth information on engine mechanicals and electrical systems, fuel and emission controls, brake and steering systems, as well as bodywork and interior components. With step-by-step instructions, diagnostic procedures, and technical specifications, this manual is an essential resource for owners, mechanics, and technicians seeking to maintain the H3 with factory-level accuracy.