2008 Hummer H3
US · SUV · Sport Utility Vehicle - 4WD
The 2008 Hummer H3 is listed in the US market as a suv with gasoline power. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.
- Engine
- Varies by configuration: 3.7L 5-cylinder, 5.3L 8-cylinder
- Transmission
- Varies by configuration: Automatic, Manual
- Drivetrain
- AWD
- Fuel
- Gasoline
- Economy
- 14 mpg (16.8 L/100 km) to 15 mpg (15.7 L/100 km) combined
Key Figures
Engine
| Specification | Value | Source |
|---|---|---|
| Engine | Varies by configuration: 3.7L 5-cylinder, 5.3L 8-cylinder | |
| Displacement | 3.7 L to 5.3 L | |
| Cylinders | 5 to 8 | |
| Fuel type | Gasoline | EPA fueleconomy.gov |
Transmission and drivetrain
| Specification | Value | Source |
|---|---|---|
| Transmission | Varies by configuration: Automatic, Manual | |
| Gears | 4 to 5 | |
| Drivetrain | AWD | EPA fueleconomy.gov |
Fuel economy and range
| Specification | Value | Source |
|---|---|---|
| Combined | 14 mpg (16.8 L/100 km) to 15 mpg (15.7 L/100 km) | EPA fueleconomy.gov |
| City | 13 mpg (18.1 L/100 km) to 14 mpg (16.8 L/100 km) | |
| Highway | 16 mpg (14.7 L/100 km) to 18 mpg (13.1 L/100 km) |
Our sources do not publish these for this vehicle: Aspiration, Power, Torque, Electric range, Battery capacity. We leave them out instead of estimating.
Trims and configurations
3 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.
Recalls
NHTSA lists 2 recall campaigns for this model year. Last checked November 9, 2026.
15V421000: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:FAN/MOTOR
General Motors LLC (GM) is recalling certain model year 2006-2010 Hummer H3 vehicles manufactured February 5, 2005, to May 24, 2010, and 2009-2010 Hummer H3T vehicles manufactured May 21, 2008, to May 24, 2010. In the affected vehicles, the connector module that controls the blower motor speed for the heating, ventilation and air conditioning system may overheat.
Remedy: GM will notify owners, and dealers will replace part of the blower motor connector and harness, free of charge. The recall began February 26, 2016. Owners may contact Hummer customer service at 1-800-732-5493. GM's number for this…
Reported July 1, 2015. View on NHTSA
10V179000: STRUCTURE:BODY:HOOD
GM IS RECALLING CERTAIN MODEL YEAR 2006 THROUGH 2010 HUMMER H3 VEHICLES. SOME OF THESE VEHICLES HAVE A CONDITION IN WHICH THE INTEGRAL CLIP-TABS ON THE LOUVER ON THE HOOD MAY FRACTURE, CAUSING THE HOOD LOUVER RATTLE AGAINST THE HOOD AND BECOME LOOSE. IF THIS INDICATOR IS UNNOTICED, ADDITIONAL CLIPS COULD FRACTURE AND THE HOOD LOUVER COULD DETACH FROM THE VEHICLE.
Remedy: DEALERS WILL APPLY AN ADHESIVE TO THE HOOD LOUVER TO SECURE IT TO THE HOOD. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON APRIL 12, 2010. OWNERS MAY CONTACT HUMMER AT 800-732-5493 OR AT THE OWNER CENTER AT…
Reported April 30, 2010. View on NHTSA
Data sources
- EPA fueleconomy.gov · retrieved November 8, 2026 · US Government public data
- NHTSA vPIC · retrieved October 16, 2026 · US Government public data
Source checked: November 8, 2026
Data verified: November 8, 2026
Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.
Compare
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Frequently asked questions
What engine does the 2008 Hummer H3 have?
Varies by configuration: 3.7L 5-cylinder, 5.3L 8-cylinder. Engines can differ by trim, so check the trim list below.
What is the fuel economy of the 2008 Hummer H3?
Combined fuel economy is 14 mpg (16.8 L/100 km) to 15 mpg (15.7 L/100 km), as published by the source shown in the specification table.
Is the 2008 Hummer H3 front-wheel, rear-wheel or all-wheel drive?
Drivetrain: AWD.
Are there recalls for the 2008 Hummer H3?
NHTSA lists 2 recall campaigns for this model year (last checked November 9, 2026). Details are in the Recalls section.