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 ...

In the diesel engine arena, there are, arguably, few powerplants held in quite as high a regard as the ... they were ...

That decision has only gotten harder in recent years, with both GM's new 6.6 and Ford's "Godzilla" 7.3-liter rolling out for ...