Earlier today, we reported how Fiat Chrysler Automobiles was accused of installing defeat devices in roughly 100,000 diesel vehicles to help circumvent emissions standards, a scheme similar to what Volkswagen did in the infamous dieselgate scandal. Now, it’s looking like General Motors is next in line to feel the heat, as a new lawsuit alleges the automaker cheated on more than 700,000 diesel Chevy Silverado and GMC Sierra trucks. This latest allegation makes GM the sixth automaker accused of using cheater software since the dieselgate scandal broke in 2015. Affected vehicles include Duramax Diesel Chevrolet Silverados and GMC Sierras between the 2011 and 2016 model years. The lawsuit is currently seeking class-action status, and was filed in U.S. District Count in Detroit in part by Hagens Berman Sobol Shapiro, the same firm involved in the VW dieselgate suit.

The lawsuit against GM alleges the damage created by the cheating GM vehicles could even exceed those of the cheating VW’s, with two to five times the legal limit of harmful emissions produced. GM was quick to respond with a statement, saying “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.”

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In all honesty, I’m not the least bit surprised by this news. GM’s innocence in the matter has yet to be proven one way or the other, but in the current auto market, any edge over the competition is pursued with gusto. Considering the extent of VW’s cheating, it would make sense that the other major automakers (all of them) might try something similar.

“GM claimed its engineers had accomplished a remarkable reduction of diesel emissions,” said attorney Steve Berman, via Automotive News. “These GM trucks likely dumped as much excess poisonous emissions into our air as did the cheating Volkswagen passenger cars.”

This week has been a whirlwind of activity with regards to emissions cheating, which leaves only one question – who’ll be the next automaker accused? Place your bets in the comments section below.