General Motors has been slapped with a new class-action lawsuit over alleged issues with the Vortec V8 engine in its GMT900 platform full-size trucks and SUVs.
This lawsuit, which was filed in U.S. District Court in the Northern District of Ohio, is yet another class-action proceeding against GM over alleged oil consumption problems in the Generation IV 5.3L Vortec V8 engine. The automaker is already facing a number of other similar class-action lawsuits over this problem, two of which were filed just this year.
The oil burn problem is allegedly caused by the PCV valve in the engines, which can draw oil out of the valvetrain and into the intake before it is burned in the combustion chambers. This lawsuit also claims the piston rings fail to maintain pressure in the crankcase and that a faulty oil pressure relief valve sprays oil directly at the piston skirts, overloading the rings and allowing oil to sneak past into the combustion chamber
These issues can lead to low oil levels in affected vehicles, the lawsuit says. Severe engine damage can occur if the engine is run with insufficient oil levels, including piston and rod damage, among other issues. The oil leakage can also foul the spark plugs, causing the engine to misfire and/or shut down completely.
GM has implemented various fixes for this issue through Technical Service Bulletins, although the plaintiff in this suit says the automaker’s suggested repairs only temporarily solve the issue.
This lawsuit claims the following GM full-size trucks and SUVs with the 5.3L LC9 Vortec V8 engine are prone to these issues:
- 2010-2014 Chevrolet Silverado
- 2010-2014 Chevrolet Suburban
- 2010-2014 Chevrolet Tahoe
- 2010-2014 Chevrolet Avalanche
- 2010-2014 GMC Sierra
- 2010-2014 GMC Yukon
- 2010-2014 GMC Yukon XL
In early November, a judge tossed out a similar lawsuit that was filed in Ohio back in 2019 after finding multiple problems with the plaintiff’s claims. The judge found GM did not breach its warranty terms and also said the plaintiff in the nationwide suit lacked standing “to assert claims under the laws of the states in which they do not reside.”
We’ll provide an update on this latest oil burn lawsuit against GM when more information becomes available.