There are certain assumptions people often make about diesels. They’re dirty. They get good fuel economy. They’re loud.The dirty part is no longer true thanks to stringent emissions standards in the United States. You can’t bring a diesel here that’s...

The GMC brand is relatively synonymous with luxury trucks. And though it has branched off into the realm of SUVs, the Sierra remains one of its most important products.So it should come as no surprise that GMC wanted to do...