🏷️ Basic Information

Make:

Hummer

Model:

H2

Year:

2006

Product Type:

Service & Repair Manual Software

Generation:

First Generation (2003-2009)

👋 Introduction

Market Position:

The Hummer H2 occupied a niche segment of the SUV market, emphasizing extreme off-road capability, imposing size, and a rugged, utilitarian aesthetic. It was positioned as a luxury off-roader with unparalleled road presence.

Competitive Analysis:

Competed with other large, capable SUVs like the Cadillac Escalade ESV, Ford Excursion (discontinued earlier), and specialized off-road vehicles. Its unique styling and brand identity differentiated it significantly.

Key Features:

Robust body-on-frame construction, powerful V8 engine, advanced four-wheel-drive system, high ground clearance, impressive towing capacity, distinctive aggressive styling, spacious interior, and extensive customization options.

Manual Value Proposition:

Provides DIY enthusiasts and professional technicians with authorized, detailed, and easily accessible repair and maintenance information, enabling cost savings and efficient vehicle upkeep.

📋 Manual Details

Coverage Areas:

Engine, Drivetrain, Transmission, Brakes, Suspension, Steering, HVAC, Electrical System, Body, Chassis, Interior, Exterior, Diagnostics, Maintenance, Troubleshooting, Repair Procedures

Page Count:

Not specified (digital access)

Manual Type:

Factory-Derived Service and Repair Manual

Language:

English

Format:

Online Software / Web-Based Access

📖 Manual Coverage

Systems Covered:

Engine Mechanical, Engine Performance, Fuel System, Ignition System, Cooling System, Lubrication System, Exhaust System, Transmission (Automatic), Transfer Case, Front Axle, Rear Axle, Drive Shafts, Brakes (ABS), Suspension (Front & Rear), Steering, Wheels & Tires, Body & Frame, Doors, Hood, Tailgate, Interior Trim, Climate Control (HVAC), Electrical Distribution System, Lighting, Instrument Panel, Audio System, Power Accessories (Windows, Locks), Cruise Control, Safety Systems (Airbags, Seatbelts), Diagnostic Trouble Codes (DTCs)

Procedures Included:

Scheduled Maintenance, Oil Change, Filter Replacement, Fluid Checks & Top-offs, Brake Pad/Rotor Replacement, Suspension Component Replacement (Shocks, Springs, Bushings), Steering System Repair, Engine Tune-up, Spark Plug Replacement, Belt Replacement, Cooling System Flush, HVAC System Service, Power Steering System Service, Fuel System Cleaning, Diagnostic Trouble Code Retrieval & Interpretation, Electrical Component Testing, Wiring Harness Repair, Body Panel Repair & Adjustment, Interior Trim Removal & Installation, Drivetrain Component Inspection & Repair, Transfer Case Service, Differential Service, Tire Rotation & Replacement, Wheel Alignment Procedures

Technical Depth:

Comprehensive; Covers routine maintenance, detailed diagnostics, component-level repairs, and complete system overhauls. Includes wiring diagrams, diagnostic flowcharts, torque specifications, and detailed disassembly/assembly procedures.

Specific Procedures:

Detailed steps for component removal and installation, torque specifications for critical fasteners, diagnostic flowcharts for common issues, wiring diagrams for the entire electrical system, specific procedures for recalibrating sensors after component replacement.

Troubleshooting:

Systematic troubleshooting guides for engine performance, HVAC issues, electrical faults, brake system problems, and driveline noises. Includes symptom-based diagnostics and step-by-step resolution paths.

Technical Data:

Includes detailed specifications for all major components, including engine specifications, transmission gear ratios, brake system component sizes, suspension geometry data, and electrical system specifications (e.g., resistance values, voltage drop tests).

📊 Manual Specifications

File Format:

Web-based application accessible via browser

Print Quality:

N/A (digital access)

Binding Type:

N/A (digital access)

Paper Type:

N/A (digital access)

Access Duration:

1 Year (with discount for extended access)

Compatibility:

PC, Laptop, Smartphone, Tablet (requires internet connection and web browser)

⚙️ Engine Specifications

Primary Engine:

6.0L Vortec V8 (LQ4)

Engine Displacement:

5967 cc (364 cu in)

Horsepower:

325 hp @ 5200 rpm

Torque:

375 lb-ft @ 4000 rpm

Fuel System:

Sequential Electronic Fuel Injection (SFI)

Engine Code:

LQ4

Valvetrain:

Overhead Valve (OHV), 2 valves per cylinder

Bore X Stroke:

4.00 in x 3.62 in (101.6 mm x 92 mm)

Compression Ratio:

9.4:1

🔧 Transmission

Standard:

4-Speed Automatic (4L65-E)

Features:

Electronic controls, Tow/Haul mode

Transfer Case:

Full-time 4WD with electronic locking rear differential

Transmission Fluid Type:

Dexron VI (GM Approved)

📐 Dimensions

Exterior Length:

207.5 inches (5271 mm)

Exterior Width:

81.5 inches (2070 mm)

Exterior Height:

77.8 inches (1976 mm)

Wheelbase:

130.0 inches (3302 mm)

Curb Weight:

approximately 7,000 lbs (3,175 kg)

Ground Clearance:

12.0 inches (305 mm)

Approach Angle:

46 degrees

Departure Angle:

38 degrees

Breakover Angle:

32 degrees

Towing Capacity:

up to 10,000 lbs (4,536 kg)

Cargo Volume:

45.8 cu ft (behind 2nd row), 138.7 cu ft (maximum)

🛡️ Safety Features

Ratings:

NHTSA frontal crash test ratings: Driver 4 stars, Passenger 4 stars. Side impact ratings were not consistently tested for this class of vehicle. Rollover resistance was a concern due to the high center of gravity.

Active Features:

Anti-lock Braking System (ABS), Traction Control System (TCS), Electronic Stability Control (ESC - may vary by package/market)

Passive Features:

Front airbags (driver and passenger), Front side-impact airbags, Three-point seatbelts with pretensioners, Child seat anchor system (LATCH), Reinforced safety cage construction.

Tire Pressure Monitoring System:

Available

💡 Technology Features

Infotainment:

Optional Navigation System, CD Player, Premium Audio Systems (Bose), Rear Seat Entertainment Systems.

Driver Assistance:

Rear Parking Assist (optional), Cruise Control.

Connectivity:

OnStar communication system (subscription-based, often included or available as an option).

Gauges And Displays:

Comprehensive instrument cluster with speedometer, tachometer, fuel gauge, coolant temperature gauge, oil pressure gauge, voltmeter, and indicator lights. Some models featured auxiliary gauges for off-road conditions.

🔧 Maintenance

Service Intervals:

Refer to manual for specific intervals based on driving conditions. General guidelines: Oil changes every 5,000-7,500 miles (or as indicated by oil life monitor), Tire rotation every 7,500 miles, Coolant flush every 5 years or 100,000 miles, Transmission fluid service every 50,000-100,000 miles.

Fluid Specifications:

Engine Oil: SAE 5W-30 (synthetic recommended), Coolant: Dex-Cool (orange) OAT coolant, Brake Fluid: DOT 3, Power Steering Fluid: GM Power Steering Fluid (P/N 12345970 or equivalent), Transmission Fluid: Dexron VI.

Known Issues:

Interior trim creaks and rattles, potential for fuel pump failure, catalytic converter issues, early wear on some suspension components, transmission temperature warnings in heavy towing conditions, power steering pump whine.

Oil Capacity:

7 quarts (6.6 liters) with filter change (6.0L Vortec V8)

Cooling System Capacity:

Approximately 17.5 quarts (16.6 liters)

Tire Size:

Standard: LT315/70R17 (all-terrain)

Wheel Bolt Pattern:

8 x 165.1 mm (8 x 6.5 inches)

Spark Plug Recommendation:

ACDelco Professional Iridium (e.g., P/N 41-110) or equivalent

📚 Vehicle History

Brand Heritage:

Hummer originated from AM General's civilian version of the High Mobility Multipurpose Wheeled Vehicle (HMMWV) or Humvee, known for its military ruggedness and off-road prowess.

Model Evolution:

The H2 was introduced for the 2003 model year, building upon the Hummer brand's reputation. It was a completely new design from the ground up, sharing a modified GM truck platform (GMT820) with the Chevrolet Tahoe/Suburban and GMC Yukon/Yukon XL. This marked a significant shift from the military-derived H1, aiming for a broader consumer base while retaining core Hummer characteristics.

Production Years:

2003-2009

Manufacturing Location:

Mishawaka, Indiana, USA

🏆 Awards & Recognition

Recognitions:

While not a recipient of mainstream 'Car of the Year' awards due to its specialized nature and fuel consumption, the Hummer H2 was recognized for its iconic styling and extreme off-road capabilities, often featured in adventure and off-road publications.

Ratings:

Fuel economy ratings were consistently poor (often single digits in city driving), which impacted its overall appeal in a market increasingly focused on efficiency.

Certifications:

N/A (General production vehicle)