General Motors used to partially own the small Japanese automaker Isuzu and used the company’s knowledge to help develop its Duramax diesel engines. Today, the Duramax diesel engine celebrates ten years in production.
“Over our company’s ten-year history, the Duramax diesel engine has become a success story and the pride of loyal Duramax owners around the world,” said Maho Mitsuya, CEO of DMAX, builder of Duramax diesels. “We’re proud of the role we’ve played in producing the leading reputation for quality, reliability, and durability in the heavy-duty truck market.”
The first Duramax diesel engines were used in ’01-model year heavy-duty pickup trucks. The turbo-diesel V-8s displaced 6.6 liters and produced 300 horsepower and 520 pound-feet of torque. Since then, the turbo-diesel V-8 configuration and displacement have remained the same, but the engine’s power output and refinement have been upgraded.
For 2011, the engine builder introduced its most powerful and efficient V-8: a 6.6-liter monster that produces 397 horsepower and 765 pound-feet of torque, up 32 horsepower and 102 pound-feet of torque over its predecessor. Additionally, the engine is over 11 percent more efficient than the outgoing engine and produces over 63 percent fewer harmful emissions.
DMAX is one of GM’s only remaining ties to now-defunct (at least in the U.S.) Isuzu, as the engine is still a 60/40 GM-Isuzu venture. The engines are used in GM’s full-size, heavy-duty pickup trucks and full-size vans, and Duramax has produced over 1.2 million engines in the past decade.