Cummins and PACCAR are updating diesel engine software to give operators more time to address certain DEF-related issues ...

The Environmental Protection Agency wants to change how diesel trucks respond when their emissions equipment runs out of ...

EPA has proposed ending diesel exhaust fluid-related engine derates, replacing the gradual dialing back of truck performance ...

The agency says the changes could save truckers $12 billion while still maintaining environmental protections.

The Environmental Protection Agency on Thursday unveiled a proposal that, while leaving in place the actual emissions limits mandated in a 2023 final rule for model year 2027 engines, could put a ...

The Chevrolet Corvair, one of the strangest Chevrolets ever built, was an American take on the Volkswagen Beetle. Like the Beetle, it had an air-cooled engine in the rear. Unlike the Beetle, it ...

EPA's relaxed NOx rule, as many expected, removes the warranty extension—and proposes annihilating the troublesome DEF derate ...

The EPA's proposed updates to heavy-duty vehicle NOx rules would eliminate mandatory engine deratements by MY2029, drawing ...

Deivis is an engineer with a passion for cars and the global auto business. He is constantly investigating about GM's future products. Get our GM news straight to your inbox. We'll send you one or two ...

The Environmental Protection Agency announced on March 27, 2026, that it is removing the diesel exhaust fluid sensor requirement for all diesel equipment, a decision the agency frames as a direct ...

The 2027 Chevrolet Silverado is expected to usher in the all-new, next-generation Silverado 1500 light-duty full-size pickup truck, while carrying over the Silverado HD and Silverado MD models. Engine ...

For months, diesel truck owners have wondered whether the Trump administration would dramatically roll back EPA emissions ...