GM is now facing a class-action suit alleging its 6.6-liter Duramax engine found in 2011-2016 Chevrolet and GMC models is not compatible with US diesel fuel.

Details of the lawsuit, which was filed this week, say GM sold “hundreds of thousands” of engines containing a Bosch fuel injection pump that pumps metal shavings into the fuel injection system, ruining both the fuel system and the entire engine. American diesel fuel is thinner than its European counterpart, allowing for air pockets that cause the metal to rub against metal and create shavings.


Duramax Engines a Ticking Time Bomb

“The pump secretly deposits metal shavings and debris throughout the fuel injection system and the engine until it suddenly and catastrophically fails without warning,” the lawsuit alleges. “Such catastrophic failure often causes the vehicle to shut off while in motion and renders it unable to be restarted because the vehicle’s fuel injection system and engine component parts have been completely contaminated and destroyed. GM promised consumers the continued reliability of their diesel engines, but with increased fuel efficiency and power at greater fuel efficiency. However, this came with a hidden and catastrophic cost that was secretly passed on to consumers,” the suit claimed while also referring to the engines as a “ticking time bomb.”