Segment:
        
        
            Mid-size SUV, known for its off-road capability and distinctive Hummer styling.
        
     
    
    
        
            Competitors:
        
        
            Jeep Wrangler, Toyota FJ Cruiser, Nissan Xterra, Ford Bronco (early generations), Land Rover LR3.
        
     
    
    
        
            Off Road Ability:
        
        
            Iconic Hummer off-road prowess, high ground clearance, robust chassis, available locking differentials.
        
     
    
        
            Styling:
        
        
            Aggressive, utilitarian design language inherited from larger Hummer models.
        
     
    
        
            Durability:
        
        
            Built on a truck-like ladder frame, designed for durability and demanding use.
        
     
 
    
    
    
        
            Systems Covered:
        
        
            Engine, Transmission (Automatic & Manual), Drivetrain, Suspension, Steering, Brakes, Electrical System, HVAC, Body, Interior, Diagnostics, Troubleshooting
        
     
    
    
        
            Estimated Page Count:
        
        
            Extensive (Software-based, equivalent to thousands of printed pages)
        
     
    
    
        
            Type:
        
        
            Online Service & Repair Manual Software (Licensed OE Information)
        
     
    
    
    
    
        
            Format:
        
        
            Web-based software accessible via browser
        
     
 
    
    
    
        
            Engine Mechanical:
        
        
            Detailed procedures for engine assembly, disassembly, diagnosis, repair, and overhaul of the 3.7L I5 engine.
        
     
    
        
            Engine Electrical:
        
        
            Complete wiring diagrams, component testing, diagnostic trouble codes (DTCs), and repair procedures for engine control systems.
        
     
    
        
            Transmission Manual:
        
        
            Repair, overhaul, and diagnostic procedures for the NV1500 5-speed manual transmission.
        
     
    
        
            Transmission Automatic:
        
        
            Repair, overhaul, and diagnostic procedures for the 4L60-E 4-speed automatic transmission.
        
     
    
        
            Drivetrain:
        
        
            Front and rear axle service, differential repair, CV joints, driveshafts, and transfer case (NVG243C).
        
     
    
        
            Suspension:
        
        
            Front torsion bar and rear leaf spring suspension repair, shock absorber replacement, wheel alignment procedures.
        
     
    
        
            Steering:
        
        
            Power steering system diagnosis and repair, steering column, steering gear replacement, and alignment.
        
     
    
        
            Brakes:
        
        
            Front and rear brake service (disc), ABS system diagnosis, repair, and bleeding procedures.
        
     
    
        
            HVAC:
        
        
            Air conditioning system diagnosis, refrigerant handling, heater core replacement, blower motor service.
        
     
    
        
            Body:
        
        
            Exterior panel repair, door mechanisms, tailgate, bumpers, and frame service.
        
     
    
        
            Interior:
        
        
            Seat removal, dashboard disassembly, trim panel replacement, and interior component service.
        
     
    
    
        
            Preventive Maintenance:
        
        
            Oil changes, filter replacements, fluid checks and top-offs, tire rotations, spark plug replacement.
        
     
    
        
            Diagnostics:
        
        
            System-specific troubleshooting guides, diagnostic flowcharts, and use of scan tools for fault detection.
        
     
    
        
            Repair And Overhaul:
        
        
            Step-by-step instructions for component removal, installation, and complete rebuilds of major systems.
        
     
    
        
            Wiring Diagrams:
        
        
            Comprehensive, system-level electrical wiring diagrams for all vehicle circuits.
        
     
    
        
            Torque Specifications:
        
        
            Detailed torque values for all fasteners across all major components.
        
     
    
    
        
            Depth:
        
        
            Factory-level diagnostic and repair procedures, including internal component specifications and tolerances.
        
     
 
    
    
    
        
            Engine Type:
        
        
            Inline 5-Cylinder (I5)
        
     
    
        
            Displacement:
        
        
            3.7 Liters (3700cc)
        
     
    
        
            Bore X Stroke:
        
        
            3.82 x 4.06 inches (97.0 mm x 103.0 mm)
        
     
    
    
        
            Valve Train:
        
        
            DOHC, 4 valves per cylinder, Variable Valve Timing (VVT)
        
     
    
    
        
            Horsepower:
        
        
            242 hp @ 5600 rpm
        
     
    
        
            Torque:
        
        
            242 lb-ft @ 3600 rpm
        
     
    
    
        
            Fuel Delivery:
        
        
            Multi-port Fuel Injection (MPI)
        
     
    
        
            Fuel Type:
        
        
            Unleaded Gasoline (87 Octane Recommended)
        
     
    
        
            Emission Control:
        
        
            Catalytic Converter, Oxygen Sensors, EGR (where applicable)
        
     
 
    
    
    
        
            Type:
        
        
            NV1500 5-Speed Manual
        
     
    
    
        
            Type:
        
        
            4L60-E 4-Speed Automatic
        
     
    
    
        
            Transfer Case:
        
        
            NVG243C Full-Time 4WD with Neutral Position. Optional: 2-speed transfer case with low range.
        
     
    
        
            Clutch Type:
        
        
            Hydraulic Actuated Single Disc (Manual Transmission)
        
     
    
        
            Automatic Transmission Features:
        
        
            Electronic shift control, Tow/Haul mode.
        
     
 
    
    
    
        
            Length:
        
        
            183.7 inches (4665 mm)
        
     
    
        
            Width:
        
        
            81.2 inches (2062 mm)
        
     
    
        
            Height:
        
        
            77.7 inches (1974 mm)
        
     
    
        
            Wheelbase:
        
        
            113.0 inches (2870 mm)
        
     
    
        
            Front Track:
        
        
            67.5 inches (1715 mm)
        
     
    
        
            Rear Track:
        
        
            67.9 inches (1725 mm)
        
     
    
    
        
            Curb Weight:
        
        
            Approx. 4,700 - 4,900 lbs (2132 - 2223 kg)
        
     
    
        
            Gross Vehicle Weight Rating Gvw:
        
        
            Approx. 6,400 lbs (2903 kg)
        
     
    
        
            Towing Capacity:
        
        
            Up to 6,000 lbs (2722 kg)
        
     
    
        
            Payload Capacity:
        
        
            Approx. 1,700 lbs (771 kg)
        
     
    
        
            Max Tongue Weight:
        
        
            600 lbs (272 kg)
        
     
 
    
    
    
        
            NHTSA Rollover Resistance:
        
        
            3 Stars (with specific tire/wheel configurations)
        
     
    
    
        
            ABS:
        
        
            Standard 4-wheel Anti-lock Braking System (ABS)
        
     
    
        
            Traction Control:
        
        
            StabiliTrak Electronic Stability Control (ESC) available on some models, Traction Control System (TCS) standard.
        
     
    
        
            AWD:
        
        
            Standard full-time 4-wheel drive with optional low-range gearing for enhanced off-road capability.
        
     
    
    
        
            Airbags:
        
        
            Frontal airbags for driver and front passenger. Optional side-impact airbags.
        
     
    
        
            Seatbelts:
        
        
            3-point seatbelts with pretensioners for all seating positions.
        
     
    
        
            Child Seat Anchors:
        
        
            LATCH (Lower Anchors and Top tethers for CHildren) system.
        
     
 
    
    
    
        
            Audio System:
        
        
            Standard AM/FM/CD player with available premium sound system, subwoofer, and auxiliary input.
        
     
    
        
            Navigation:
        
        
            Optional factory-installed navigation system.
        
     
    
    
        
            Parking Assist:
        
        
            Optional rear parking assist sensors.
        
     
    
    
        
            Bluetooth:
        
        
            Optional Bluetooth hands-free phone integration.
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Every 7,500 miles or 6 months, whichever comes first (synthetic blend recommended).
        
     
    
        
            Tire Rotation Interval:
        
        
            Every 7,500 miles.
        
     
    
        
            Engine Air Filter Replacement:
        
        
            Inspect every 15,000 miles, replace as needed (more often in dusty conditions).
        
     
    
        
            Spark Plug Replacement:
        
        
            Approximately 100,000 miles (using recommended iridium spark plugs).
        
     
    
        
            Transmission Fluid Change:
        
        
            Refer to manual for specific intervals based on usage (severe duty may require more frequent changes).
        
     
    
    
        
            Engine Oil:
        
        
            SAE 5W-30, API SN or newer, Dexos certified (for 3.7L I5).
        
     
    
        
            Coolant:
        
        
            GM P/N 12346290 (Green Extended Life Antifreeze/Coolant) or equivalent.
        
     
    
        
            Automatic Transmission Fluid:
        
        
            Dexron VI (for 4L60-E)
        
     
    
        
            Manual Transmission Fluid:
        
        
            GL-4 or GL-5 rated synthetic gear oil, viscosity 75W-90 (for NV1500)
        
     
    
        
            Power Steering Fluid:
        
        
            GM P/N 89021184 (Dexron III/VI ATF) or equivalent.
        
     
    
        
            Brake Fluid:
        
        
            DOT 3 or DOT 4 (check reservoir cap).
        
     
    
    
        
            Heater Core Leaks:
        
        
            Some H3 models have experienced premature heater core failure, leading to coolant leaks into the cabin.
        
     
    
        
            Radiator Leaks:
        
        
            Plastic end tanks on the radiator can degrade and leak over time.
        
     
    
        
            Suspension Wear:
        
        
            Ball joints and tie rod ends can experience premature wear due to the vehicle's weight and off-road use.
        
     
    
        
            Cv Axle Boots:
        
        
            Torn CV axle boots can lead to joint failure, especially with off-road driving.
        
     
    
        
            Oil Pan Gasket:
        
        
            Oil pan gasket leaks can occur.
        
     
 
    
    
    
        
            Brand Origin:
        
        
            Hummer originated from AM General's Humvee military vehicle, adapted for civilian use.
        
     
    
    
        
            Introduction Year:
        
        
            The Hummer H3 was introduced for the 2006 model year.
        
     
    
        
            Previous Generations:
        
        
            The H3 is a smaller, more fuel-efficient model compared to the larger H1 and H2.
        
     
    
    
        
            Manufacturing Location:
        
        
            Shreveport, Louisiana, USA
        
     
    
        
            Production Span:
        
        
            2005-2010