This new lawsuit is essentially identical to the previous class-action proceeding that was filed against GM in the U.S. District Court for the Northern District of Ohio late last year. This suit has been filed in the U.S. District Court for the Western District of Washington at Seattle.
Just like the previous case, this lawsuit claims the 5.3L V8 engine found in certain 2010-2014 model-year GM trucks and SUVs are prone to burning oil. These engines, the suit claims, have a flawed piston ring design that may lead to excessive oil consumption. Additionally, the suit claims the positive crankcase ventilation system (PCV) may suck engine oil out from the valvetrain and deposit it into the intake, causing it to be burned away. The suit also says the active fuel management system causes excessive oil to be sprayed onto the piston skirts, allowing it to sneak past the piston rings and causing it to burn off.
Also like the previous suit, the filing points out that the electronic oil monitoring system in affected trucks and SUVs will not inform the driver about the oil level itself, but only the quality of the oil. The plaintiffs claim this allowed the low oil levels to go undetected before they experienced significant problems with their engine. GM told dealerships to carbonize the rings and combustion chambers of affected vehicles as part of a technical service bulletin, but this is not a permanent fix, the suit says.
As we pointed out before, GM redesigned its 5.3-liter V8 engine after the 2014 model year, using different piston rings and adding a shield to deflect oil away from the piston skirts. The newer versions of the engine also feature a true oil level sensor and new valve covers. Vehicles involved in this class action were all built between 2010 and 2014.
The list of vehicles included in this class action suit includes:
- 2010-2013 GMC Sierra
- 2010-2014 GMC Yukon
- 2010-2014 GMC Yukon XL
- 2010-2014 Chevrolet Avalanche
- 2010-2013 Chevrolet Silverado
- 2010-2014 Chevrolet Suburban
- 2010-2014 Chevrolet Tahoe