This comprehensive 2004 Hummer H2 Service and Repair Manual provides you with the same information used by technicians at dealerships to maintain, service, diagnose, and repair your vehicle. Get step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications for all aspects of your Hummer H2. From basic maintenance to complex repairs, this manual covers everything you need to know.

The manual is organized to make finding the information you need easy. You'll find sections on:

* **Maintenance:** Covers routine maintenance tasks like oil changes, filter replacements, and fluid checks.
* **Engine:** Detailed information on the engine, including troubleshooting, repair procedures, and specifications.
* **Control System:** Explains the operation of the vehicle's control systems, such as the engine control unit and transmission control module.
* **Mechanical:** Covers all the mechanical components of the vehicle, including the suspension, brakes, steering, and drivetrain.
* **Fuel Service Specifications:** Provides information on fuel system components, specifications, and troubleshooting.
* **Emission Control:** Explains the operation of the vehicle's emission control system and how to diagnose and repair problems.
* **Intake, Exhaust, and Cooling:** Detailed information on the intake, exhaust, and cooling systems, including repair procedures and specifications.
* **Lube:** Provides information on lubrication systems and recommended lubricants.
* **Ignition, Starting, and Charging:** Covers the ignition, starting, and charging systems, including troubleshooting and repair.
* **Auto Transmission and Clutch:** Explains the operation of the automatic transmission and clutch, including troubleshooting and repair.
* **Manual Transmission:** Covers the manual transmission, including troubleshooting and repair procedures.
* **Transfer Case, Propeller Shaft, and Drive Shaft:** Information on the transfer case, propeller shaft, and drive shaft, including repair and maintenance procedures.
* **Differential and Axle:** Covers the differential and axle systems, including troubleshooting and repair.
* **Suspension:** Provides information on the suspension system, including repair and maintenance procedures.
* **Tire and Wheel:** Covers tire and wheel maintenance, replacement, and specifications.
* **Brake Control:** Explains the operation of the brake control system and how to diagnose and repair problems.
* **Brake System:** Covers the brake system, including troubleshooting and repair procedures.
* **Parking Brake:** Provides information on the parking brake system, including troubleshooting and repair.
* **Steering Column:** Covers the steering column, including troubleshooting and repair procedures.
* **Power Steering:** Provides information on the power steering system, including troubleshooting and repair.
* **Air Conditioning:** Explains the operation of the air conditioning system and how to diagnose and repair problems.
* **Supplemental Restraint System:** Covers the airbag system, including troubleshooting and repair procedures.
* **Seat Belt:** Provides information on the seat belt system, including troubleshooting and repair procedures.
* **Engine Immobilizer:** Explains the operation of the engine immobilizer system and how to diagnose and repair problems.
* **Cruise Control:** Provides information on the cruise control system, including troubleshooting and repair.
* **Wiper and Washer:** Covers the wiper and washer system, including troubleshooting and repair procedures.
* **Door Lock:** Provides information on the door lock system, including troubleshooting and repair procedures.
* **Meter, Audio/Visual, Horn:** Covers the instrument cluster, audio system, and horn, including troubleshooting and repair procedures.
* **Windshield, Glass, and Mirror:** Covers the windshield, glass, and mirror, including troubleshooting and repair procedures.
* **Instrument Panel:** Provides information on the instrument panel, including troubleshooting and repair procedures.
* **Seat:** Covers the seat system, including troubleshooting and repair procedures.
* **Engine Hood and Door:** Covers the engine hood and door, including troubleshooting and repair procedures.
* **Exterior and Interior:** Provides information on the exterior and interior of the vehicle, including troubleshooting and repair procedures.
* **Electrical:** Covers the electrical system, including troubleshooting and repair procedures.
* **Multiplex/CAN Communication:** Explains the operation of the vehicle's multiplex and CAN communication systems.

With this comprehensive manual, you'll have the information you need to handle any repairs with confidence.

The 2004 Hummer H2, a behemoth of an SUV, was a symbol of American power and luxury in the early 2000s. Built on a robust ladder frame and powered by a 6.0-liter Vortec V8 engine, the H2 delivered impressive torque and off-road capabilities. While its civilian roots stemmed from the military Humvee, the H2 was designed for a more luxurious experience, featuring leather upholstery, a premium sound system, and a host of comfort and convenience amenities. This second-generation Hummer was renowned for its commanding presence on the road, its imposing size and bold styling making it instantly recognizable. However, the H2's fuel-thirsty nature and hefty price tag ultimately contributed to its downfall, as the SUV struggled to appeal to a wider audience in a market increasingly focused on fuel efficiency.

Despite its high curb weight and its thirsty engine, the 2004 Hummer H2 was lauded for its off-road capabilities thanks to its rugged construction, high ground clearance, and locking differentials. Standard features included a four-wheel drive system, a two-speed transfer case, and an advanced suspension system capable of handling rough terrain with ease. The H2 also offered a robust towing capacity, making it suitable for hauling trailers and other heavy loads. However, the H2's success was hampered by its relatively high price point and its limited fuel economy. As the market shifted towards smaller, more efficient SUVs, the H2's popularity waned, ultimately leading to the discontinuation of the entire Hummer brand in 2010. The 2004 Hummer H2 remains a testament to the era of gas-guzzling SUVs, a vehicle that embodied the American desire for power and prestige.