This is the "light-duty truck loophole" that lets the U.S. auto industry continue to sell bigger and more profitable SUVs and pickups, that are allowed to pump out 41% higher CO2 emissions than ...

Toyota does not offer a heavy-duty truck, and the Nissan Titan is different in that it has something the brand calls a Titan XD, which is more capable than a light-duty half-ton truck but less ...

WASHINGTON — Like smaller, light-duty trucks that have seen a push toward more luxury, the more capable heavy-duty trucks are following suit. There are seven different models for the Ram 2500 ...

Medium- and heavy-duty vehicles account for about 23 percent of US vehicle emissions. That's much less than the amount of greenhouse gases emitted each year by light-duty vehicles, but if anything ...