🏷️ Basic Information Identification Make: GM (General Motors) Model: Hummer H2 Model Years Covered: 2003, 2004, 2005, 2006, 2007 Vehicle Type: Full-size SUV Platform: GMT820 (based on Chevrolet Tahoe/Suburban) 👋 Introduction Market Position Target Audience: Do-it-yourselfers and professional mechanics seeking detailed repair and maintenance information for the Hummer H2. Competitive Analysis Value Proposition: Provides an inexpensive and effective way to maintain and repair the vehicle, saving on labor costs. Key Features Instructional Method: Step-by-step instructions, detailed illustrations, diagrams, and wiring schematics. Illustrations Diagrams: Hundreds of photos and illustrations, vacuum diagrams, serpentine belt routing diagrams. Diagnostic Tools: Covers computer diagnostic codes and trouble trees. 📋 Manual Details Coverage Areas Vehicle Systems Covered: Engine, Transmission, Brakes, Suspension, Steering, Electrical, HVAC, Fuel System, Cooling System, Drivetrain, Body, Chassis, Interior Systems, Sunroof, Emissions Control Page Count Total Pages: 5000+ Manual Type Type: Complete Service and Repair Manual Language Language: English Format File Format: PDF Accessibility: Instant Download, Searchable, Bookmarked 📖 Manual Coverage Systems Covered Engine Mechanical: Overhaul, Rebuilding, Performance Tuning, Troubleshooting Engine Electrical: Ignition System, Starting System, Charging System, Engine Control Module (ECM) Diagnostics, Wiring Schematics Transmission Drivetrain: Removal, Installation, In-Car Servicing, U-Joint and CV-Joint Service Braking System: Service Procedures, Diagnostics, ABS System Components Suspension Steering: Front End Alignment Procedures and Specifications, Suspension Component Replacement Climate Control: Air Conditioning Service, Capacities, Component Diagnosis Procedures Included Maintenance: Factory Maintenance Schedules and Charts, Fluid Capacities, Filter Part Numbers Diagnostics: Trouble Codes, Computer Diagnostic Trouble Tree Charts, Troubleshooting Procedures Repair Rebuild: Step-by-step instructions for component overhaul and rebuilding Timing: Timing Belt Replacement (if applicable to specific engines), Serpentine Belt Routings with Diagrams Technical Depth Depth: Comprehensive coverage from basic maintenance to complete engine and transmission rebuilding, including advanced diagnostics and wiring schematics. 📊 Manual Specifications File Format Quality: High-resolution PDF, suitable for zooming and printing Compatibility: Windows, Mac, Linux OS, iOS (iPhone, iPad), Android devices Portability: Can be saved to hard-drive, burned to CD-ROM Print Quality Printability: Printable pages for on-site workshop use Binding Type Binding: Digital (PDF format - no physical binding) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: Vortec 6.0L V8 (LQ4/LQ9) Engine Displacement Displacement: 5967 cc (364 cu in) Performance Horsepower Approx: 316-325 hp @ 5200 rpm (depending on year and specific variant) Torque Approx: 373-385 lb-ft @ 3600 rpm (depending on year and specific variant) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) Engine Features Firing Order: 1-8-4-3-6-5-7-2 Engine Maintenance Oil Capacity Approx: 6 quarts (5.7 Liters) with filter (check specific year for exact capacity) Recommended Oil Viscosity: 5W-30 (refer to manual for exact specification) 🔧 Transmission Standard Transmission Transmission Type: 4-Speed Automatic (4L62-E/4L65-E) Optional Transmission Transmission Type: N/A (Standard for the period) Features Transmission Fluid Capacity Approx: Approximately 12-13 quarts (11.4-12.3 Liters) for refill (check specific year for exact capacity) Recommended Transmission Fluid: Dexron III / Dexron VI (refer to manual for exact specification) 📐 Dimensions Exterior Length Overall: 207.5 inches (5271 mm) Width Overall: 81.5 inches (2070 mm) Height Overall: 78.0 inches (1981 mm) Weights Curb Weight Approx: 6,800-7,000 lbs (3,084-3,175 kg) Gross Vehicle Weight Rating Approx: 8,600 lbs (3,901 kg) Towing Capacity Approx: 6,500-7,000 lbs (2,948-3,175 kg) Wheels Tires Wheelbase: 130.0 inches (3302 mm) Standard Tire Size: 315/70R17 (Commonly) Bolt Pattern: 8 x 6.5 inches (8 x 165.1 mm) 🛡️ Safety Features Ratings NHTSA Rollover Resistance Score: 3-star (indicative of its high center of gravity and large size) Active Features ABS: Standard Anti-lock Braking System Traction Control: Standard Traction Control System (TCS) Passive Features Airbags: Frontal airbags for driver and front passenger Body Construction: Robust body-on-frame construction typical of heavy-duty trucks. 💡 Technology Features Infotainment Features: Basic infotainment systems for the era, often including AM/FM stereo with CD player, optional navigation systems. Driver Assistance Features: Primarily focused on core vehicle functions; advanced driver-assistance systems (ADAS) were not common on this model. Connectivity Features: Limited connectivity options by modern standards. May include auxiliary inputs for audio. 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual, typically 5,000-7,500 miles or 6-12 months, under normal driving conditions. Severe use requires more frequent changes. Transmission Fluid Change: Refer to manual, often recommended around 50,000-100,000 miles or under severe service conditions. Coolant Flush: Refer to manual, typically every 30,000-60,000 miles or 2-4 years. Fluid Specifications Power Steering Fluid: Dexron III / Dexron VI (refer to manual for exact specification) Brake Fluid: DOT 3 (refer to manual for exact specification) Known Issues Common Problems: Potential for fuel pump failure, some electrical gremlins, exhaust manifold leaks, and typical wear items associated with heavy vehicles. Fuel Economy: Known for poor fuel economy due to its size, weight, and engine. 📚 Vehicle History Brand Heritage Brand Legacy: Leverages the Hummer brand's association with military-style off-road capability and ruggedness. Model Evolution Introduction Year: 2003 Design Philosophy: Designed as a more civilian-oriented, luxurious...