🏷️ Basic Information

Make:

Hummer

Model:

H2

Year:

2006

Chassis Code:

GMT820

👋 Introduction

Positioning:

The 2006 Hummer H2 was positioned as a premium, large, and highly capable off-road SUV, emphasizing its ruggedness, imposing presence, and American heritage.

Competitors:

Competed with other large luxury SUVs such as the Cadillac Escalade, Lincoln Navigator, and Range Rover, though with a distinct focus on extreme off-road capability and a more utilitarian, yet premium, aesthetic.

Off Road Capability:

Significant ground clearance, robust suspension, and a low-range transfer case for exceptional off-road prowess.

Towing Hauling:

Strong towing and hauling capacities due to its heavy-duty chassis and powerful V8 engine.

Interior Appointments:

While rugged, the interior offered premium appointments for its time, including leather seating and advanced features.

Value:

This manual provides the definitive resource for maintaining, diagnosing, and repairing the 2006 Hummer H2, offering factory-level accuracy and completeness that empowers owners to perform complex tasks themselves, saving time and money.

📋 Manual Details

Manual Type:

Factory Service and Repair Manual

Language:

English

Format:

PDF

Scope:

All Models and All Repairs A-Z

Estimated Page Count:

Detailed but not specified; typical for comprehensive factory manuals covering all systems.

📖 Manual Coverage

Engine:

Detailed diagnostics, repair, and overhaul of the 6.0L V8 Vortec engine, including cooling, lubrication, fuel delivery, ignition, and emission control systems.

Transmission:

Service and repair of the 4-speed 4L65-E automatic transmission, including torque converter, valve body, solenoids, and electronic controls. Covers fluid types and change intervals.

Drivetrain:

Comprehensive coverage of the four-wheel-drive system, including transfer case (2-speed with locking differential), front and rear axles, drive shafts, and CV joints. Includes differential fluid specifications.

Suspension Steering:

Detailed procedures for front and rear suspension components, including torsion bar front suspension, coil spring rear suspension, shock absorbers, ball joints, control arms, and steering system (recirculating ball type power steering).

Brakes:

In-depth coverage of the hydraulic brake system, including ABS, front and rear disc brakes, brake calipers, rotors, pads, master cylinder, power booster, and parking brake system.

Electrical Chassis:

Extensive electrical schematics and troubleshooting for all chassis electrical systems, including lighting, power windows, door locks, mirrors, wipers, washers, horn, and instrument panel.

Electrical Powertrain:

Wiring diagrams and diagnostic procedures for engine control module (ECM), powertrain control module (PCM), transmission control module (TCM), and related sensors and actuators.

HVAC:

Troubleshooting and repair of the air conditioning and heating systems, including refrigerant types, charging procedures, compressor, evaporator, condenser, and blower motor.

Body:

Procedures for exterior and interior trim, doors, hood, glass, mirrors, seats, and body panel alignment. Includes details on convertible top mechanisms for specific trims if applicable.

Safety Systems:

Detailed information on Supplemental Restraint System (SRS) airbags, seat belt pre-tensioners, and related control modules and diagnostics.

Multiplex Communication:

Coverage of the vehicle's multiplex/CAN communication network, including diagnostic procedures for module communication and data exchange.

Maintenance:

Scheduled maintenance, fluid level checks, filter replacements, belt inspections, and lubrication procedures.

Diagnostics:

Troubleshooting guides, diagnostic trouble codes (DTCs), and step-by-step diagnostic procedures for all major systems.

Repair Rebuild:

Complete instructions for disassembly, repair, and reassembly of all major mechanical and electrical components.

Wiring Schematics:

Comprehensive, full-color wiring diagrams for all electrical systems, including power distribution, grounds, and component connections.

Specifications:

Detailed torque specifications, clearances, fluid capacities, wear limits, and other critical technical data for accurate repairs.

Depth:

Factory-level technical depth, suitable for professional technicians and advanced DIY mechanics. Covers everything from basic fluid changes to complete engine and transmission overhauls.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable PDF, allowing for quick keyword-based information retrieval.

Printable:

Yes, all pages are printable, allowing users to print specific sections or the entire manual.

Image Enhancement:

Images and diagrams can be blown up for detailed viewing and printing in enlarged formats.

Binding:

Digital format (PDF), eliminating physical binding concerns.

Paper Type:

N/A (Digital format)

⚙️ Engine Specifications

Engine Type:

Vortec 6000 (6.0L) V8 OHV

Displacement:

5967 cc (364 cubic inches)

Horsepower:

325 hp @ 5200 rpm (approximate)

Torque:

370 lb-ft @ 4000 rpm (approximate)

Fuel Delivery:

Sequential Electronic Fuel Injection (SFI)

Fuel Type:

Unleaded gasoline, premium octane recommended for optimal performance.

Coolant Type:

Dex-Cool (Orange colored, ethylene glycol based) long-life coolant.

Oil Type:

SAE 5W-30 Synthetic Blend or Full Synthetic

Oil Capacity:

7.0 US quarts (6.6 liters) with filter change.

Emission Standards:

Meets EPA standards for Tier 1 vehicles.

🔧 Transmission

Type:

4-speed automatic overdrive

Model:

4L65-E

Transfer Case:

2-speed full-time 4WD with lockable center differential.

Automatic Transmission Fluid:

Dexron-III or Dexron-VI (check manual for specific recommendation).

Automatic Transmission Fluid Capacity:

Approximately 11.7 US quarts (11.1 liters) dry fill, lower for routine changes.

📐 Dimensions

Length:

207.1 inches

Width:

81.2 inches

Height:

79.2 inches

Wheelbase:

130.0 inches

Curb Weight:

Approx. 6,900 - 7,200 lbs (3,130 - 3,265 kg)

Gross Vehicle Weight Rating:

Approx. 8,600 lbs (3,900 kg)

Towing Capacity:

Up to 9,000 lbs (4,082 kg)

Cargo Volume Behind 2Nd Row:

Approx. 45.7 cubic feet

Cargo Volume Total:

Approx. 131.6 cubic feet

Standard Tire Size:

LT315/70R17

Wheel Bolt Pattern:

8x165.1 mm (8x6.5 inches)

🛡️ Safety Features

NHTSA Front Driver:

4 Stars

NHTSA Front Passenger:

5 Stars

NHTSA Side Impact Front Driver:

5 Stars

NHTSA Side Impact Rear Passenger:

5 Stars

ABS:

4-wheel anti-lock braking system (ABS)

Traction Control:

Full-range traction control (TCS)

Airbags:

Frontal airbags for driver and front passenger; available side-impact airbags for front and rear occupants.

Seat Belts:

3-point seat belts with pretensioners for all seating positions.

Child Safety:

LATCH (Lower Anchors and Tethers for CHildren) system for rear seats.

💡 Technology Features

Audio System:

Available premium audio systems with CD player, AM/FM stereo. Optional navigation and rear-seat entertainment systems were available.

Cruise Control:

Standard cruise control system.

Connectivity Features:

Limited connectivity for the era; may include features like OnStar for certain models/packages.

🔧 Maintenance

Oil Change Interval:

Every 5,000 - 7,500 miles or 6-12 months, depending on driving conditions and oil type used. Refer to manual for exact specifications.

Tire Rotation:

Every 5,000 - 7,500 miles

Transmission Fluid Change:

Typically around 50,000 - 100,000 miles, or sooner under severe service. Manual to confirm specific interval.

Coolant Change:

Initial change at 100,000 miles, then every 50,000 miles thereafter for Dex-Cool.

Brake Fluid:

DOT 3 (or DOT 4, check manual)

Power Steering Fluid:

GM Power Steering Fluid (or Dexron-III/VI) - check manual.

Differential Fluid:

API GL-5, SAE 80W-90 for both front and rear differentials. May require limited-slip additive for rear differential depending on options.

Common Problems:

Potential issues can include fuel pump failures, ignition coil failures, ABS sensor issues, and early wear on suspension components if subjected to heavy off-road use.

பராமரிப்பு Tips:

Regularly check and maintain all fluid levels, particularly transmission and differential fluids. Inspect suspension and steering components for wear, especially if used off-road. Proper maintenance of the cooling system is crucial.

📚 Vehicle History

Hummer Heritage:

The Hummer brand originated from AM General's High Mobility Multipurpose Wheeled Vehicle (HMMWV), commonly known as the Humvee. The Hummer H1 was the civilian version, and the H2 was developed as a more mass-market, albeit still substantial, SUV.

H2 Development:

The H2 was introduced for the 2003 model year. It was based on a heavily modified GM platform (GMT820 truck chassis, shared with the Chevrolet Tahoe/Suburban and GMC Yukon/Yukon XL) rather than the H1's bespoke military chassis. This allowed for more conventional automotive engineering and features.

Manufacturing Location:

H2 vehicles were assembled by AM General at its Mishawaka, Indiana, plant for General Motors.

Model Years:

2003-2009

🏆 Awards & Recognition

Off Road Awards:

While not typically receiving traditional automotive awards, the H2 was recognized for its extreme off-road capabilities and status as an icon of its segment.