With deliveries of diesel versions of the Chevrolet Colorado and GMC Canyon set to get underway, GM has announced that the pair have been certified as the most fuel efficient in Canada.
Highway fuel economy estimates for two-wheel drive versions of the diesel Colorado and Canyon are 7.7 L/100 km.
Four-wheel drive versions get a rating of 8.2 L/100 km.
Numbers on the Ram Trucks website put the 3.0-litre diesel-powered two-wheel drive Ram 1500 at 8 L/100 km on the highway, while the two-wheel drive Ford F-150 powered by the 2.7-litre EcoBoost gas engine, its most fuel efficient, is rated at 9.2 L/100 km on the highway.
The secret to the Colorado and Canyon's success is the new 2.8-litre Duramax turbo-diesel four-cylinder under the hood.
Mated to a six-speed automatic transmission, the 2.8-litre makes 181 horsepower and 369 lb.-ft. of torque.
City highway fuel consumption is estimated at 10.8 L/100 km in two-wheel drive, and 12 L/100 km in four-wheel drive.
In a move that was surely sparked by the Volkswagen diesel emissions scandal, the U.S. EPA has issued a so-called "Certificate of Conformity"—essentially a note that it has no concerns regarding the trucks' emissions control systems.
Pricing for the diesel engine on both trucks is $4,585 more than a comparably equipped 3.6-litre V6 model.