Smaller diesel engine being considered by GM for their pickup trucks.
GM is considering offering a small displacement diesel engine for its Chevrolet Silverado and GMC Sierra 1500 pickups.
The engine should boost fuel economy on the trucks. A 4.5-liter V8 diesel could be added to the Silverado and Sierra 1500's lineup.
With Ford's unveiling of the new 2015 F-150, that makes extensive use of aluminum to shed weight and improve fuel economy (expected at 30 mpg), and the Ram 1500 EcoDiesel that has a fuel economy rating of 28 mpg, Gm needs to improve efficiency as its best fuel economy offering on a pickup right now is 24 mpg.