Touting an EPA-estimated 31 mpg highway, the 2016 Colorado two-wheel drive model equipped with the Duramax turbo-diesel is now being called the most fuel-efficient pickup in the country! Complete with a 21-gallon fuel tank, which gives it the ability to offer a maximum highway range of 651 miles per tank, the Colorado diesel model is one of the most desirable up-and-coming midsize trucks today and it will be available soon at Midway Chevy.