Hummer H3 2006–2010 car dimensions: 4742 mm long, 1872 mm wide and 1892 mm high. Unladen weight is 2,132 kg. Braked towing is 2,041 kg.
The cabin seats five adults in supportive bucket seats with dual-density foam, available in cloth or leather. Dual-zone climate control and electronic cruise control come standard, along with power windows, tilt steering, and OnStar. An optional navigation system adds a display in some trims. Driver aids stay basic with traction control and StabiliTrak on automatics. no parking sensors appear. A reversing camera arrives as an option from 2008.
Cargo volume measures 835 liters behind the rear seats and grows to 1576 liters with the 60/40 split rear seats folded. The side-hinged rear door and external spare keep the floor open for loading.
Maximum braked towing reaches 2041 kg with the automatic transmission and proper equipment. manuals rate lower at 1361 kg. Payload capacity sits at 522 kg. A trailering package adds a hitch and wiring.
The available Off-Road Suspension Package brings firmer tuning, locking differential, and higher crawl ratios for heavier work or rough use. An engine oil cooler comes standard.
The cabin seats five with dual-density foam and soft bolsters that give solid support on rough ground. Cloth is standard. leather is available. Front seats can come with six-way power adjustment and heating on higher packages. A large power sunroof with express open/close and anti-pinch is optional. Controls sit high and clear, with chrome accents and available leather-wrapped wheel and shifter for a more finished feel.
Regular unleaded fuel. EPA figures around 14-16 city / 18-20 hwy depending on engine and year.
23-gallon fuel tank.
Oil-life monitor. change oil and filter when the message appears, at least once a year. Maintenance I and II alternate.
Spark plugs listed for 100,000 miles.
Standard dual-stage front airbags with passenger sensing, four-wheel ABS, traction control, OnStar, and tire-pressure monitoring. StabiliTrak with automatic transmission. side-curtain airbags optional early then standard.
NHTSA frontal 5 stars driver / 4 passenger, side 5 stars, rollover 3 stars. IIHS Acceptable in moderate-overlap front and side (with curtains), Poor for rear/head restraints.
The H3 runs on regular unleaded. Early 3.5-liter five-cylinder models posted EPA numbers near 16 city and 19-20 highway. later 3.7-liter versions sat closer to 14 city and 18 highway. The V8 Alpha was thirstier. A 23-gallon tank gives decent range for a heavy body-on-frame SUV.
Service follows the oil-life system. Change oil and filter when the DIC message lights, or at least yearly, and reset the monitor. Alternate Maintenance I and II checks cover chassis lube, filters, brakes, tires, and fluids. Spark plugs are a 100,000-mile item. Long-life components keep tune-ups infrequent under normal use.
Standard safety kit includes dual-stage front airbags with passenger sensing, four-wheel ABS discs, full-function traction control, OnStar, remote keyless entry, and tire-pressure monitoring. StabiliTrak comes with the automatic. Roof-rail side curtains started optional and became standard later. Structure uses a reinforced cage and crumple zones. Crash scores were strong in frontal and side tests but weaker in rollover and rear-head-restraint ratings.
Keep it by staying on the oil-life schedule, checking underbody shields after off-road use, and watching for common age-related items like seat heaters and power-seat wiring. Parts remain available through GM channels. the ladder frame and simple systems make routine care straightforward if you treat it like a truck.
Length 4742 mm, Width 1872 mm, Height 1892 mm, Wheelbase 2842 mm (H3 2006–2010)
Sources: manufacturer data, General Motors of Canada 2006 HUMMER H3 brochure, document 122-06-B-002E, Technical Specifications, HUMMER 2006 H3 debut specification sheet, No top speed is published.