"To further advance General Motors commitment to low emissions, the 2015 Chevrolet Silverado 1500 and GMC Sierra 1500 will now be available with a highly advanced V8 diesel engine. The 4.5 liter turbocharged diesel will give the new General Motors light trucks class leading torque (560 foot-pounds) and ground breaking fuel economy. EPA highway mileage will exceed 30 miles per gallon. Visit www.gm.com for further details." - UPI