General Motors is launching the 2015 Chevrolet Colorado and GMC Canyon with what looks like segment-leading highway fuel efficiency for four-cylinder midsize pickup trucks, according to EPA fuel economy estimates.

The Colorado and Canyon's 2.5L four-cylinder engine.

The Colorado and Canyon’s 2.5L four-cylinder engine.

The all-new midsize trucks, powered by the 2.5L four-cylinder engine with 2WD and available 6-speed automatic transmission, will have an EPA-estimated 20 mpg city and 27 mpg highway, for a combined 22 mpg rating overall, stated GM.

Meanwhile, trucks outfitted with 4WD will have EPA-estimated 19 city mpg and 25 mpg highway for a combined 21 mpg. According to GM, this gives the Colorado and Canyon segment-leading highway fuel efficiency and segment-leading power for a four-cylinder models with automatic transmissions.

The 2.5L four is estimated at 193 horsepower and 184 pound-feet of torque, with approximately 90 percent of the peak torque available between 2,000 rpm and 6,200 rpm.

“The 2015 GMC Canyon uses innovations like available active grille shutters, which close to get the most out of every gallon of fuel and open when more air is needed, like when transporting heavy loads” said Kenn Bakowski, Canyon marketing manager. “Having segment-leading V-6 and four-cylinder efficiency, plus the highest payload rating, proves GMC has applied the latest technologies in just the right places, and our customers reap the benefits.”

For comparison, the optional 3.6L V6 offers an EPA-estimated 26 mpg highway fuel economy.

Both trucks began shipping to dealers last week.

For 2016, GM will add a 2.8-liter Duramax turbodiesel under the hood.

For 2016, GM will add a 2.8-liter Duramax turbodiesel under the hood.

For the 2016 model year, GM said the Colorado and Canyon will add a 2.8-liter Duramax turbodiesel to the engine lineup. Technical details and EPA fuel economy estimates will be available closer to launch. GM added this Duramax engine is already offered in global markets.