The idea for a V12 truck engine came about in the late 1950s. General Motors was interested in an engine that could rival the performance of a diesel engine because, at the time, diesel-powered medium ...

For 2017, the GMC Sierra 2500HD and 3500HD are now offered with a more potent Duramax 6.6-liter turbocharged diesel engine ... 2017 GMC Sierra and gasoline-powered Sierra HD pickup trucks. Three new ...