GM's mass-market diesel engine has seen many variations, but these three stand out as the best.

For decades now, the big three American automakers have been engaged in a game of one-upmanship over which company can fit the most powerful and torquiest diesel engines in their trucks. And, just as ...

Performance, towing, fuel economy, and more details about the Chevy and GMC models with the first-generation Duramax inline-six. The first-generation 3.0-liter LM2 Duramax diesel engine was a GM ...