Duramax 6.6L Turbo Diesel V8 engine

The Duramax Turbo Diesel is paired with the Allison® 1000 6-speed automatic transmission. A proven powertrain, with more than 1.2 million on the road since 2000, the Duramax is our most powerful diesel ever, rated at 397 hp @ 3000 rpm and 765 lb-ft of torque at 1600 rpm. The Duramax is B20 biodiesel compatible and includes an exhaust brake, engine block heater and heavy-duty dual alternators.