2016 Diesel Chevrolet Colorado and GMC Canyon

The 2016 Chevrolet Colorado and GMC Canyon with 2.8-liter turbo charge four cylinder engines have been certified by the EPA at 31 mpg on the highway, the highest ranking of any truck big or small with gasoline or diesel engines.

General Motors is moving forward with its plan to add diesel engines to its line-up in spite of the emissions fiasco with Volkswagen's diesel engines that has caused increased scrutiny by U.S. regulators for vehicles with diesel engines.

The 2016 Colorado and Canyon are scheduled to go on sale before the end of the year at a price that is about $3,000 more than the gasoline powered V-8 trucks.

Officially the ratings from the EPA for the Colorado and Canyon are 22 mpg city and 31 mpg highway and 25 combined.