More Diesel Emissions Cheating Alleged

A class action lawsuit has been filed against General Motors alleging that its Duramax diesel engines used “cheat software” in violation of EPA emissions regulations.

Just days after the U.S. Dept. of Justice filed a civil suit accusing Fiat Chrysler with using “cheat software” to bypass emissions regulations in Dodge Ram and Jeep Grand Cherokee SUVs, General Motors is being hit with a class action lawsuit alleging that it also rigged thousands of diesel vehicles to pass emissions tests.

The class-action suit covers people who own or lease more than 705,000 Chevrolet Silverado and GMC Sierra pickups fitted with GM Duramax diesel engines from the 2011 to 2016 model years. The complaint was filed in U.S. District Court in Detroit.

In a statement posted on its website, GM said “These claims are baseless and we will vigorously defend ourselves.  The Duramax Diesel Chevrolet Silverado and GMC Sierra comply with all U.S. EPA and CARB emissions regulations.”

Germany’s Robert Bosch GmbH  was also named as a defendant for having allegedly helped develop the defeat devices, in an “unusually close” collaboration with GM.  A Bosch spokesperson declined comment.

Earlier in the week, Fiat Chrysler was indicted in civil court by the U.S. Justice Dept. over the use of so-called “cheat” software in the 3.0 L EcoDiesel used in 104,000 engines used in Dodge Ram 1500 trucks and Jeep Grand Cherokee vehicles since 2014. The engines were built by Fiat subsidiary VM Motori, which was also named in the suit. The maximum fine could be as high as $4.6 billion.

Fiat Chrysler is vigorously denying allegations that it programmed its engines to bypass the emissions control technology on its engines. Fiat Chrysler is also facing a separate criminal investigation on the same emissions issue, as well as probes by the U.S. Securities and Exchange Commission and several states.