In 2006, The HUMMER H1 was offered as a heavily modified Alpha model. The HUMMER H1 Alpha model received up to 520 pound-feet of torque from a 6.6-liter Duramax turbo diesel engine. The higher ...

Mil-Spec's off-road H1 models are cool too ... Under the hood is a tweaked 6.6-liter Duramax diesel good for 800 horsepower (597 kilowatts) and an obscene amount of torque. It’s all handled ...

Duramax is the name of a series of diesel engines built by General Motors from 2001 onwards. Several GM vehicles have been offered with a Duramax diesel engine over the years, the most notable ...