Vehicle
Hummer H2
The full-size one, and underneath the military styling it is GM truck: a GMT820 frame shared with the Suburban and Yukon XL, the 6.0 and 6.2 small-block V8s, and the 4L65E or 6L80 behind them. Silverado and Suburban information applies to nearly all of it. What is genuinely its own is the air suspension at the rear and the full-time four-wheel drive with a locking centre differential, which is where its chassis codes come from. Very heavy for its powertrain, so transmission temperature and torque-converter behaviour are worth reading before a shift-quality complaint.
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Generations
-
First generation 2002–2009
A GMT820 truck under the styling — Suburban and Silverado information covers the powertrain; the rear air suspension and locking centre differential are its own.
- Body styles
- SUV · Pickup
- Platform
- GMT820
- Engines
-
- 6.0 V8 — LQ4 · petrol · 236–242 kW (316–325 hp) · 488–495 Nm (360–365 lb-ft)
- 6.2 V8 — L92 · petrol · 293 kW (393 hp)
- Transmissions
- 4-speed 4L60E automatic · 4-speed 4L65E automatic · 6-speed 6L80E automatic
- Drivetrain
- Four-wheel drive
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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