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

Add Yahoo as a preferred source to see more of our stories on Google. For decades now, the big three American automakers have been engaged in a game of one-upmanship over which company can fit the ...

With the introduction of the '07 GMT900 trucks, you can get a 2500HD or 3500HD with an all-new body and interior wrapped around a cleaner and more powerful version of the famous Duramax diesel or a ...