All new in 2015, the Colorado received some solid upgrades for 2016. The biggest news comes in the form of diesel power, making it (and its corporate sibling from GMC) the only midsize truck to offer a diesel. The colorado’s smaller size and Duramax diesel give it the best fuel efficiency of any truck on the market, with 22 city mpg, 31 highway mpg and 25 mpg combined. The Duramax offers 181 horsepower, 369 pound-feet of torque and a 7,700-pound tow rating. Also new for 2016 is the off-road oriented Trail Boss trim. Go crew cab, with the diesel, for $37,000.