GM has been told by the EPA and the California Air Resources Board that the new diesel-powered versions of the Chevrolet Colorado and GMC Canyon pickups will not be certified until they have been tested on the road as well as in the lab.
GM has been told by the EPA and the California Air Resources Board that the new diesel-powered versions of the Chevrolet Colorado and GMC Canyon pickups will not be certified until they have been tested on the road as well as in the lab.