🏷️ Basic Information

Make:

Hummer

Model:

H1

Year:

2006

Product Name:

Hummer H1 2006 Repair Service Manual

Product Description:

Service Manual Repair PDF Download

Vin Prefix:

1GC

Generation Code:

1st Generation (Original HMMWV-based)

👋 Introduction

Market Segment:

Ultra-high mobility vehicle (UHMW), civilian version of the HMMWV. Positioned as a highly capable, off-road focused SUV with unparalleled durability and go-anywhere capability.

Key Competitors:

Few direct competitors due to its unique design and purpose. Competed more in spirit with other high-end SUVs or specialized off-road vehicles, but offered a distinct military-derived platform.

Durability:

Built with a robust, ladder-frame chassis and heavy-duty components designed for extreme conditions.

Off Road Capability:

Features include high ground clearance, excellent approach/departure angles, locking differentials, and the Central Tire Inflation System (CTIS).

Portal Axles:

Unique portal gear hubs provide superior ground clearance.

Tire Size:

Typically equipped with large, aggressive tires (e.g., 37x12.50R17 or larger).

📋 Manual Details

Primary Coverage:

All Hummer H1 models for the 2006 model year.

Engine Variants Covered:

Likely covers the 6.5L GM V8 Turbo Diesel (LLC Code L65) and potentially the 5.7L GM V8 Vortec (LS6) if optioned in the H1 Wagon/SUV variants for 2006, though diesel is more common.

Body Styles Covered:

Covers all H1 body styles including Hardtop, Softtop, Wagon, and potentially Ambulance/Truck variants.

Estimated Page Count:

N/A (Digital PDF, actual content volume varies)

Manual Type:

Repair Service Manual / Workshop Manual

Target Audience:

Professional Technicians and DIY Mechanics with basic electrical and mechanical knowledge.

Language:

English

File Format:

PDF

Delivery Method:

Instant Download

Software Requirements:

Adobe PDF Reader, WinZip

Compatibility:

All Versions of Windows & Mac

📖 Manual Coverage

Engine Mechanical:

Detailed procedures for disassembly, inspection, repair, and reassembly of engine components, including block, cylinder head, pistons, crankshaft, camshaft, timing components, lubrication system, cooling system.

Engine Management:

Covers fuel injection system (including injection pump, injectors), ignition system (if applicable to diesel), glow plug system, exhaust system, engine control module (ECM) operation and diagnostics.

Transmission:

Detailed repair information for the Allison 1000 (or similar heavy-duty automatic transmission) including torque converter, valve body, internal components, and transmission control module (TCM).

Drivetrain:

Covers transfer case operation, differentials (front, rear, center), CV joints, driveshafts, portal axle assemblies, and the Central Tire Inflation System (CTIS).

Suspension:

Detailed information on the independent front and rear suspension, control arms, springs, shock absorbers, sway bars, and associated bushings.

Brakes:

Covers hydraulic brake system, ABS (Anti-lock Braking System) components, brake rotors, calipers, brake lines, and parking brake system.

Steering:

Details on the power steering system, steering gear, steering column, and tie rod ends.

Electrical System:

Comprehensive wiring diagrams, component locations, fuse box information, diagnostic procedures for lighting, power windows, power locks, HVAC controls, and instrument cluster.

Body And Chassis:

Information on body panel removal and installation, door mechanisms, seat mechanisms, frame structure, and corrosion protection.

HVAC:

Covers air conditioning system, heater core, blower motor, climate control panels, and refrigerant handling.

Scheduled Maintenance:

Step-by-step instructions for routine maintenance tasks such as oil changes, filter replacements, fluid checks, belt inspections, and lubrication.

Diagnostic Troubleshooting:

Diagnostic flowcharts and troubleshooting guides for common issues related to engine, transmission, electrical systems, and more.

Repair Procedures:

Detailed, step-by-step repair instructions for virtually all mechanical and electrical components of the Hummer H1.

Disassembly And Assembly:

Comprehensive instructions for removing, disassembling, cleaning, inspecting, and reassembling various vehicle components.

Component Testing:

Procedures for testing the functionality and performance of individual components using appropriate tools and equipment.

Torque Specifications:

Essential torque values for critical fasteners throughout the vehicle.

Wheel Alignment:

Specifications and procedures for wheel alignment parameters.

Wheel Tire Service:

Information on tire pressure, wheel balancing, and tire replacement.

Depth Of Information:

Factory-level technical detail, covering everything from routine maintenance to complete engine and transmission rebuilds.

Diagnostic Capabilities:

Provides guidance for diagnosing electronic and mechanical faults, often referencing diagnostic trouble codes (DTCs) if the vehicle is equipped with an OBD-II system.

Special Tools:

Identifies and describes special tools required for specific repair procedures.

📊 Manual Specifications

Print Quality:

Full Printable

Zoom Functionality:

YES

Binding Type:

N/A (Digital PDF)

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Type:

Turbocharged Direct Injection Diesel

Engine Displacement:

6.5 Liters (395 cu in)

Engine Code:

LLC Code L65 (Duramax variant for some models, or the older 6.5L Turbo Diesel)

Bore X Stroke:

4.06 in x 3.89 in (103 mm x 99 mm)

Compression Ratio:

21.0:1

Horsepower:

Approx. 195-215 hp @ 3200-3400 RPM (depending on specific variant)

Torque:

Approx. 430-475 lb-ft @ 1800-2000 RPM (depending on specific variant)

Fuel Type:

Diesel Fuel

Injection System:

Direct Injection, Bosch VP-44 or similar rotary injection pump.

Fuel Filter Part Number Example:

GM P/N 25162602 (may vary)

Oil Capacity Quarts:

Approx. 8.5 Quarts (with filter) for 6.5L Diesel

Recommended Oil Viscosity:

API CJ-4 or CK-4 rated diesel engine oil, SAE 15W-40 is common.

Coolant Capacity Quarts:

Approx. 18.9 Quarts (with heater) for 6.5L Diesel

Coolant Type:

GM DEX-COOL® (Orange) or equivalent silicate-free, extended life antifreeze.

🔧 Transmission

Transmission Type:

Heavy-duty 4-speed Automatic Transmission

Transmission Model:

Allison 1000 (likely)

Gear Ratios:

Refer to manual for specific ratios of Allison 1000. Typically: 1st: 3.10, 2nd: 1.80, 3rd: 1.40, 4th: 1.00, Reverse: 2.48 (example, verify in manual)

Transmission Fluid Capacity Quarts:

Approx. 12.5 Quarts (verify in manual for Allison 1000)

Transmission Fluid Type:

Dexron-III H, Dexron-VI, or an approved Allison TES 295 fluid.

📐 Dimensions

Overall Length In:

Approx. 184.5 - 200+ inches (depending on body style)

Overall Width In:

Approx. 86.5 inches

Overall Height In:

Approx. 77.4 inches

Wheelbase In:

Approx. 130 inches (standard wheelbase)

Ground Clearance In:

Approx. 16 inches (unloaded, under differential)

Curb Weight Lbs:

Approx. 6,500 - 7,500 lbs (depending on configuration)

Gross Vehicle Weight Rating Gvwr Lbs:

Approx. 10,000 - 11,000 lbs

Payload Capacity Lbs:

Approx. 1,500 - 3,000 lbs

🛡️ Safety Features

NHTSA Ratings:

N/A (Due to its niche and heavy-duty nature, NHTSA testing was not typically performed on the civilian H1 in the same way as standard passenger vehicles).

ABS:

Standard Anti-lock Braking System (ABS).

Ctis:

Central Tire Inflation System (CTIS) allows for on-the-fly adjustment of tire pressure for different terrains.

Seat Belts:

Three-point seat belts in front and rear seating positions (configuration dependent).

Rollover Protection:

Robust frame and body structure contribute to significant rollover protection, inherent to its military design.

💡 Technology Features

Infotainment System:

Basic AM/FM/CD player with a simple speaker system. Later models may have had optional upgraded audio or navigation.

ABS:

Standard Anti-lock Braking System (ABS).

Ctis:

Central Tire Inflation System (CTIS) for adaptive tire pressure.

OBD Ii Port:

Likely equipped with an OBD-II port for diagnostic scanning, although advanced diagnostic functions may require specific Hummer or GM software.

🔧 Maintenance

Engine Oil And Filter Change:

Every 5,000 - 7,500 miles or 6 months, whichever comes first (refer to manual for exact diesel recommendations).

Transmission Fluid And Filter Service:

Every 30,000 - 50,000 miles (consult manual for Allison 1000 specific recommendations).

Coolant Flush And Replacement:

Every 2-5 years or 30,000-50,000 miles, depending on coolant type used.

Fuel Filter Replacement:

Every 15,000 - 30,000 miles or annually, depending on fuel quality and conditions.

Power Steering Fluid:

Refer to manual, typically a Type A, Suffix A (TASA) or Dexron-III compatible fluid.

Brake Fluid:

DOT 3 or DOT 4.

Glow Plug System:

Glow plugs and control modules can be prone to failure, leading to hard starting in cold weather.

Central Tire Inflation System:

Hoses, valves, and control unit for CTIS can develop leaks or malfunctions.

Diesel Injection Pump:

The Bosch VP-44 injection pump is known for potential failure, often without much warning.

Cv Joints And Boots:

Due to extreme articulation and off-road use, CV joints and boots can wear out or be damaged.

Portal Axle Seals:

Leaks from portal axle seals can occur, requiring timely replacement to prevent damage.

📚 Vehicle History

Hummer Origin:

The Hummer brand originated from the High Mobility Multipurpose Wheeled Vehicle (HMMWV), developed by AM General for the US military.

Hummer H1 Introduction:

The civilian Hummer H1 was introduced in 1992, based directly on the military HMMWV.

Gm Acquisition:

General Motors acquired the Hummer brand from AM General in 1999.

2006 Model Year:

The 2006 model year represents a later iteration of the H1 before its discontinuation, featuring updated engines and creature comforts compared to early models, while retaining its core ruggedness.

Production Years:

1992-2006 for the H1 civilian model.

Manufacturing Location:

Mishawaka, Indiana, USA

🏆 Awards & Recognition

Off Road Awards:

The Hummer H1 is widely recognized as one of the most capable production off-road vehicles ever made, though specific awards are rare due to its niche market.

Consumer Ratings:

Generally receives high ratings for off-road performance and durability, but often lower ratings for on-road comfort, fuel economy, and interior amenities.

Emissions Certification:

Meets applicable EPA emissions standards for its model year.