🏷️ Basic Information

Make:

Hummer

Model:

H3

Year:

2010

Body Style:

Mid-size SUV

Generation:

First Generation (GMT355 platform)

Platform Code:

GMT355

👋 Introduction

Market Position:

The 2010 Hummer H3 was positioned as a unique, off-road capable, mid-size SUV with distinctive styling. It appealed to consumers seeking a rugged vehicle with a commanding presence, often associated with adventure and the Hummer brand's military heritage. While it shared some underpinnings with GM's mid-size truck platform, its off-road prowess and iconic design set it apart.

Competitive Analysis:

Competed against other mid-size SUVs known for off-road capability or robust build, such as the Jeep Wrangler Unlimited, Toyota 4Runner, and Land Rover LR4. Its narrower track and more compact dimensions compared to larger Hummers (H1, H2) broadened its appeal, but its fuel efficiency and on-road manners were often points of comparison against less rugged rivals like the Ford Explorer or Chevrolet TrailBlazer.

Key Features:

Distinctive Hummer styling, excellent off-road capability (high ground clearance, 4WD standard), strong towing capacity, rugged interior design, available powerful V8 engine.

📋 Manual Details

Coverage Areas:

Engine, Transmission, Drivetrain, Brakes, Steering, Suspension, Electrical System, HVAC, Body, Chassis, Diagnostics, Maintenance

Page Count:

Extensive (Digital; equivalent to thousands of printed pages due to interactive nature)

Manual Type:

Service and Repair Manual Software

Language:

English

Format:

Online Software / Web-based Access

📖 Manual Coverage

Systems Covered:

Engine mechanical (3.7L Vortec I5, 5.3L V8), Powertrain control modules (PCM), Transmission (4-speed automatic 4L60-E, 4-speed automatic 4L70-E, 5-speed manual NV1500), Drivetrain (4WD system, locking differentials, transfer case), Brakes (ABS, EBD, hydraulic components), Suspension (front independent, rear solid axle), Steering (power assisted), Fuel system, Exhaust system, Cooling system, Ignition system, Charging system, Starting system, Body electrical, HVAC system, Lighting, Chassis components, Interior and exterior trim, Safety systems (airbags, seat belts)

Procedures Included:

Routine maintenance (oil changes, filter replacements, fluid checks), Component diagnosis and testing, Repair procedures for all major systems, Troubleshooting guides for common and uncommon issues, Wiring diagrams, Exploded views, Torque specifications, Special tool recommendations, Replacement procedures for all serviceable parts, HVAC system diagnostics and repair, Brake bleeding and component replacement, Suspension and steering alignment procedures, Engine tune-up and internal component repair, Transmission overhaul and service

Technical Depth:

Comprehensive OE-level technical information, suitable for both DIY enthusiasts and professional technicians. Covers everything from basic fluid checks to complete engine and transmission rebuilds.

📊 Manual Specifications

File Format:

Web-based software requiring internet connection and browser. No local download.

Print Quality:

N/A (Digital format)

Binding Type:

N/A (Digital format)

Paper Type:

N/A (Digital format)

⚙️ Engine Specifications

Primary Engine 2010:

3.7L LLR Vortec inline-5 cylinder

Horsepower 3.7L I5:

239 hp @ 5200 rpm

Torque 3.7L I5:

241 lb-ft @ 3600 rpm

Optional Engine 2010:

5.3L LH6 Vortec V8

Horsepower 5.3L V8:

300 hp @ 5200 rpm

Torque 5.3L V8:

320 lb-ft @ 4000 rpm

Fuel System:

Multi-port Fuel Injection (MPFI)

Emission Control:

Catalytic converter, Oxygen sensors, EGR (where applicable)

🔧 Transmission

Standard Transmission 2010:

5-speed manual (NV1500)

Optional Transmission 2010:

4-speed automatic (4L60-E / 4L70-E)

4Wd System:

Full-time 4WD with electronic locking rear differential standard on most trims. Some models feature a 2-speed transfer case with a neutral position.

Automatic Transmission Fluid:

Dexron VI (GM P/N 88861950 or equivalent)

Manual Transmission Fluid:

GL-4, SAE 75W-90 (GM P/N 12346123 or equivalent)

📐 Dimensions

Wheelbase:

111.3 inches (2827 mm)

Length:

188.0 inches (4775 mm)

Width:

77.1 inches (1958 mm)

Height:

75.0 inches (1905 mm)

Curb Weight Approx:

4,770 - 5,030 lbs (2164 - 2281 kg) depending on engine and configuration

Towing Capacity Max:

Up to 6,000 lbs (2722 kg) for V8 models

Cargo Volume Behind Rear Seat:

34.0 cubic feet (0.96 m³)

Cargo Volume With Rear Seat Folded:

72.7 cubic feet (2.06 m³)

🛡️ Safety Features

NHTSA Frontal Driver Rating:

5 Stars

NHTSA Frontal Passenger Rating:

5 Stars

NHTSA Side Driver Rating:

5 Stars

NHTSA Side Rear Passenger Rating:

5 Stars

NHTSA Rollover Rating:

4 Stars

Active Features:

Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Traction Control System (TCS), StabiliTrak Stability Control (optional on some trims)

Passive Features:

Frontal airbags (driver and passenger), Side-curtain airbags (optional), 3-point seat belts with pretensioners, LATCH child seat anchors

💡 Technology Features

Infotainment System Standard:

AM/FM stereo with CD player and auxiliary input jack. Higher trims may offer a premium audio system.

Infotainment System Optional:

Optional features include in-dash 6-disc CD changer, satellite radio (XM), and navigation system.

Driver Assistance Features:

Cruise control. Rear park assist was available as an option on some models.

Connectivity Features:

Standard auxiliary audio input. Bluetooth connectivity was an available option on some higher trims.

🔧 Maintenance

Engine Oil Change Interval:

7,500 miles (12,000 km) or 12 months, whichever comes first. Check owner's manual for specific driving conditions.

Engine Oil Filter Replacement:

Replace with engine oil change.

Engine Air Filter Replacement:

Every 30,000 miles (48,000 km) or as needed based on operating conditions.

Coolant Replacement Interval:

Initial change at 5 years or 100,000 miles (160,000 km), then every 2 years or 30,000 miles (48,000 km).

Engine Oil Specification:

SAE 5W-30 Full Synthetic (GM P/N 19297567 or equivalent)

Engine Coolant Specification:

GM Vehicle Coolant (GMC Yellow), P/N 10527371 or equivalent (50/50 mix of deionized water and DEX-COOL® antifreeze)

Brake Fluid Specification:

DOT 3 or DOT 4

Known Issues Typical:

Potential issues include premature wear of front suspension components (ball joints, tie rod ends), minor oil leaks from engine seals, power steering fluid leaks, and occasional HVAC system blower motor failures. Some owners report concerns about fuel economy, particularly with the V8 engine. The powertrain control module (PCM) can also be a source of issues if not properly diagnosed.

📚 Vehicle History

Brand Heritage:

The Hummer brand originated from AM General, a military vehicle manufacturer. The civilian Hummer H1 was a direct descendant of the HMMWV (High Mobility Multipurpose Wheeled Vehicle), known for its extreme off-road capabilities and ruggedness. General Motors acquired the brand in 1999, leading to the development of the more consumer-oriented H2 and H3 models.

Model Evolution:

The Hummer H3 was introduced for the 2006 model year as the smallest and most fuel-efficient Hummer. It was based on GM's GMT355 platform, which also underpinned the Chevrolet Colorado and GMC Canyon pickup trucks. The 2010 model year represented the final production year for the H3 before the Hummer brand was discontinued by GM in 2010 due to economic conditions and changing consumer preferences.

Production Years:

2006-2010

Manufacturing Location:

Shreveport, Louisiana, USA

🏆 Awards & Recognition

Recognitions:

While specific awards for the 2010 H3 are not widely publicized, the Hummer brand itself was recognized for its unique styling and off-road prowess. The H3 was often lauded for its maneuverability and capability in challenging terrain compared to its larger siblings. The manual itself, as software, would be judged on its comprehensiveness and ease of use for repairs and maintenance.