The 6.6 Duramax is the senior of the two, debuting for the 2001 model year. According to MotorTrend, it was the first U.S. market diesel engine to use a "high-pressure common-rail, direct ...

General Motors’ 6.6-liter ... LB7 Duramax was equipped with the Bosch Common Rail Injector and used lightweight aluminum alloy cylinder heads. Perhaps the automaker’s best diesel engine ...

This 2024 GMC Sierra 2500HD Denali Ultimate features a Full Throttle 7-9" lift kit to go with Elka shocks and just sold for $89,500. The truck has 10,000 miles on its 6.6-liter Duramax turbodiesel ...