It seems as if GM may have shown that it's working on a smaller Duramax (its diesel technology partner Isuzu has a wide range of diesel engines), which might give the owners of half-ton trucks and ...

In fact, GM's heavy duty pickup truck market share has jumped nearly tenfold in the six years that Duramax engines have been offered.

No fewer than 461,839 full-size trucks and sport utility vehicles equipped with Duramax turbo diesel engines may experience rear-wheel lockup from transmission valve failure. Recalled vehicles ...