Chevrolet is bringing CNG power to the Silverado HD

Chevrolet is taking CNG-powered vehicles seriously, with so many of their trucks being used in commercial fleets, so it was perhaps no surprise that we'd see a version of the 2015 Silverado HD that can be run either on gasoline or compressed natural gas before long. Chevrolet brought the 2015 Silverado 2500 HD CNG to the Chicago Auto Show, to let prospective buyers as well as the media to learn about at the savings that could be realized with this environmentally friendly setup. The HD CNG truck will offer bi-fuel capability coupled with its 6.0-liter V8 engine that's been modified with hardened valves and valve seats to run on compressed natural gas.

Spied: 2014 Corvette Stingray Indy pace car

UPDATE: The Stingray has indeed been named the 2013 Indy 500 pace car; check out details and photos here We've suspected that the 2014 Chevrolet Corvette Stingray would earn a place of honor as the pace car for the 2013 Indy 500. Now, spy photos of a safety-light-equipped C7 caught testing at the General Motors proving grounds in Milford, Mich. seem to confirm our hunch.

Peugeot Onyx concept [w/Gallery]

Peugeot has previewed its Onyx concept, set to debut at this month's Paris motor show, just days after the first teaser images were released. Very much a supercar in terms of its proportions and form, the Onyx is not the first time Peugeot's previewed super and super-sports cars in concept form, but the Onyx looks a lot more promising than previous efforts, from these photos at least. Conforming to the modern, eco-conscious supercar norm, the Onyx features a hybrid drivetrain - following in the footsteps of the BMW i8, Honda NSX and Jaguar CX-75.  Peugeot's stated aim is to push itself upmarket and become a more premium brand, so the Onyx could be read as a sign that the company feels it needs more of a 'halo' car in order to achieve that aim.