🏷️ Basic Information

Make:

Hummer

Model:

H3

Year Start:

2006

Year End:

2010

Generation Designation:

First Generation

Chassis Code:

GMT355

👋 Introduction

Target Audience:

Hummer H3 owners, independent repair shops, and DIY enthusiasts seeking professional-level repair information.

Advantage:

Vehicle-specific, dealership-level documentation, offering a significant advantage over generic repair guides. Provides a singular, integrated PDF for ease of access.

Accessibility:

Single, easy-to-use PDF format, eliminating the need to consult multiple physical manuals. Searchable content for quick information retrieval.

Cost Effectiveness:

Empowers users to perform repairs themselves, potentially saving significant costs associated with dealership or independent mechanic labor.

📋 Manual Details

General Coverage:

All Models, All Repairs A-Z

Specific Coverage:

Maintenance, Engine, Control System, Mechanical, Fuel Service, Emission Control, Intake, Exhaust, Cooling, Lube, Ignition, Starting, Charging, Automatic Transmission, Manual Transmission, Transfer Case, Propeller Shaft, Drive Shaft, Differential, Axle, Suspension, Tire & Wheel, Brake Control, Brakes, Parking Brake, Steering Column, Power Steering, Air Conditioning, Supplemental Restraint System (SRS), Seat Belts, Engine Immobilizer, Cruise Control, Wipers & Washers, Door Locks, Meter, Audio/Visual Systems, Horn, Windshield/Glass/Mirrors, Instrument Panel, Seats, Engine Hood/Doors, Exterior & Interior Trim, Electrical Systems, Multiplex/CAN Communication

Page Count Indicator:

Comprehensive (Exact count not specified but implied to be extensive)

Type:

Service and Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Systems:

Engine mechanical, fuel injection, ignition, lubrication, cooling, emissions control, intake and exhaust systems.

Drivetrain Systems:

Automatic transmission (4L60-E), manual transmission (NV1500, NV3550), transfer case, drive shafts, differentials, axles, and suspension components.

Braking Steering Systems:

Hydraulic brake systems, ABS, parking brake, power steering, and steering column components.

Electrical Overview:

Comprehensive electrical schematics, wiring diagrams, multiplex/CAN communication systems, lighting, instrumentation, audio-visual, comfort controls, and safety systems.

Maintenance Procedures:

Routine maintenance tasks, fluid changes, filter replacements, belt inspection, and general upkeep.

Diagnostic Procedures:

Troubleshooting guides, diagnostic trouble code (DTC) interpretation, and fault finding for all major systems.

Repair Procedures:

Detailed step-by-step repair instructions for mechanical, electrical, and body components, including component removal, installation, and adjustment.

Special Procedures:

Air conditioning service, Supplemental Restraint System (SRS) handling, engine immobilizer, and cruise control system diagnostics and repair.

Depth Of Coverage:

Factory-level detail, mirroring the information used by dealership technicians, covering everything from basic maintenance to complex diagnostic and repair procedures.

📊 Manual Specifications

Format Details:

Digital PDF, compatible with Adobe Acrobat Reader. High resolution for clarity and zoom functionality.

Printability:

Fully printable; users can select and print specific pages or sections as needed for workshop use.

Binding:

Digital (No physical binding)

Paper Recommendation:

User-printable on standard or heavier-duty paper stock for workshop durability.

⚙️ Engine Specifications

Engine Code And Description:

3.7L Vortec LLR I5 (2007-2010), 3.5L Vortec L52 I5 (2006)

Horsepower Range:

Approx. 220 hp (3.7L) to 242 hp (3.7L with VVT)

Torque Range:

Approx. 225 lb-ft (3.5L) to 242 lb-ft (3.7L)

Fuel Delivery:

Sequential Electronic Fuel Injection (EFI)

Fuel Type:

Unleaded Gasoline

Cooling Medium:

Ethylene Glycol-based coolant (refer to manual for specific type and mix ratio)

🔧 Transmission

Transmission Type:

5-speed manual transmission (NV1500 on early models, NV3550 on later models)

Transmission Type:

4-speed automatic transmission (4L60-E)

Transfer Case:

Standard 2-speed electronically controlled 4WD transfer case (2H, 4H, 4L) with optional locking rear differential.

📐 Dimensions

Wheelbase:

Approximately 113 inches (2870 mm)

Overall Length:

Approximately 189.8 inches (4821 mm)

Overall Width:

Approximately 81.5 inches (2070 mm)

Overall Height:

Approximately 77.1 inches (1958 mm)

Curb Weight:

Approximately 4,500 - 5,000 lbs (2041 - 2268 kg), depending on configuration.

Towing Capacity:

Up to 5,000 lbs (2268 kg) with appropriate trailering package.

🛡️ Safety Features

NHTSA Frontal Impact Driver:

5 Stars

NHTSA Frontal Impact Passenger:

5 Stars

NHTSA Side Impact Driver:

5 Stars

NHTSA Side Impact Rear Passenger:

5 Stars

IIHS Moderateroverlap Frontal Offset:

Good

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Standard Traction Control System (TCS)

Stability Control:

Available StabiliTrak Electronic Stability Control

Airbags:

Standard front airbags, available side curtain airbags.

Seat Belts:

3-point seat belts with pretensioners and load limiters.

💡 Technology Features

Audio System:

Optional premium sound systems, CD player, AM/FM radio. Auxiliary input available on some models.

Navigation:

Optional factory-installed navigation system.

Cruise Control:

Standard cruise control system.

Multiplex System:

CAN (Controller Area Network) multiplexed electrical system for communication between various modules.

🔧 Maintenance

Oil Change Interval:

Refer to manual; typically 7,500 miles or 6 months for synthetic blend oil, or 3,000-5,000 miles for conventional.

Tire Rotation:

Every 7,500 miles or as recommended by tire wear.

Spark Plugs:

Replace around 100,000 miles (specific interval depends on engine variant and plug type).

Engine Oil Spec:

SAE 5W-30 (check manual for specific GM dexos or equivalent requirements).

Transmission Fluid Auto:

Dexron-VI (for 4L60-E)

Transmission Fluid Manual:

GL-4 or GL-5 rated manual transmission fluid (specific viscosity to be confirmed in manual).

Coolant Spec:

GM P/N 12346290 or equivalent (Dex-Cool, orange color) - 50/50 mix with distilled water.

Common Wear Item:

Tie rod ends and ball joints due to vehicle weight and suspension design.

Common Issue 1:

Front hub bearing failures can occur with higher mileage or off-road use.

Common Issue 2:

Water pump leaks and serpentine belt issues.

Common Issue 3:

Potential for transmission solenoid issues in automatic transmissions.

📚 Vehicle History

Brand Identity:

Hummer, known for its rugged, off-road-capable military heritage, transitioned to civilian vehicles, emphasizing bold styling and go-anywhere capability.

H3 Introduction:

The H3 was introduced as a smaller, more affordable, and fuel-efficient (relatively speaking) alternative to the H1 and H2, based on GM's GMT355 platform.

Manufacturing Location:

Shreveport, Louisiana, USA (GM Shreveport Assembly)

Production End:

Production ceased in 2010 following the dissolution of Hummer as a brand.

🏆 Awards & Recognition

Design Award:

While specific awards may vary, the H3 was recognized for its unique styling and off-road prowess.

Consumer Reports Rating:

Consumer Reports ratings varied, often citing interior space and fuel economy as areas for improvement, while acknowledging its off-road capability.