Looks like it’s General Motors’ turn in the barrel: The automaker has been accused of installing defeat devices in its trucks’ diesel engines in an attempt to beat emissions tests. People who own or lease Duramax diesel-powered Chevrolet Silverados and GMC Sierras filed a lawsuit claiming the company installed multiple such devices in two heavy-duty truck models from 2011 to 2016. The 190-page complaint mentions Volkswagen AG 83 times, according to Automotive News. More than 705,000 Duramax-equipped pickups could be impacted by the suit.

The filing asserts that the environmental damage each truck caused could surpass that of the VW’s. Automotive News reports that the complaint, filed in U.S. District Court in Detroit, says GM’s cheating allowed its trucks to pass U.S. inspections, even while spewing emissions two to five times the legal limit under regular driving conditions.

In a statement, GM said the claims are baseless, that its Duramax diesels comply with all U.S. EPA and CARB emissions regulations and that it will vigorously defend itself.

The lawsuit seeks class-action status. GM is the sixth carmaker linked to cheating diesel software since 2015, when VW admitted to installing software to bypass pollution rules.

Earlier this week, the U.S. Justice Department sued Fiat Chrysler Automobiles, alleging clean-air rule violations. Daimler AG is the target of a German probe related to diesel emissions, and French carmakers Renault SA and PSA Group are both being investigated in their home country.

The suit against GM names supplier Robert Bosch, also caught up in the VW and Daimler situations.

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