General Motors May Have Installed a Defeat Device E-mail
June 05, 2017

General Motors may have installed software in two models of heavy-duty diesel trucks that allows the trucks to cheat on emissions tests.  These “Defeat Devices,” allegedly minimize the emission of nitrogen oxide while the vehicles were being tested but allow the vehicles to emit 2 to 5 times as much nitrogen oxide under normal driving conditions.

The vehicle models under investigation are:

2011-2016 Chevrolet Silverado Duramax Diesel

2011-2016 GMC Sierra Duramax Diesel

If you or anyone you know owns one of these vehicles, please contact Finkelstein Thompson LLP. You can reach us at This email address is being protected from spam bots, you need Javascript enabled to view it or call us toll-free at 1-877-337-1050.