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Chevrolet, GMC Vehicle Engines Excessive Oil Consumption Ohio Class Action

The complaint for this class action says General Motors, LLC vehicles equipped with the Generation IV 5.3 Liter V8 Vortec 5300 LC9 engines are “engineered to fail.” The complaint alleges that the engine consumes excessive amounts of oil consumption for several reasons, and that experience engine damage, seizure, and stalling.

The class for this action is all current and former owners and lessees of class vehicles that were bought or leased in the state of Ohio. The class vehicles are model years 2010-2014 of the following:

  • Chevrolet Avalanche
  • Chevrolet Silverado
  • Chevrolet Suburban
  • Chevrolet Tahoe
  • GMC Sierra
  • GMC Yukon
  • GMC Yukon XL

The excessive oil consumption is caused by multiple factors. The primary cause, the complaint says, “is that the piston rings that GM installed within the Generation IV Vortec 5300 Engines fail to keep oil in the crankcase.”

Another factor the is Active Fuel Management (AFM) system that changes the engines from eight-cylinder to a four-cylinder operation for light duty. The complaint claims the AFM has “an oil pressure relieve [sic] valve that sprays oil directly at the piston skirts. This oil spray overloads and foul the defective piston rings, triggering oil migration past the rings. This migrating oil either burns or accumulates as carbon buildup on the combustion chamber’s surfaces.”

The fact that four of the cylinders are not operating in this mode also contributes, the complaint says: “Combustion controls upward oil migration by providing an opposing force and by assisting piston ring sealing, and when it’s absent the oil consumption accelerates.”

Next, the complaint points to “a flawed PVC system that vacuums atomized oil from the valvetrain into the intake system…”

Then there’s the Oil Life Monitoring System, which is supposed to tell drivers when the vehicle doesn’t have enough oil. The complaint alleges that the system doesn’t actually monitor oil levels. “Rather, it monitors engine conditions, such as revolutions and temperature, to calculate the expected deterioration in oil quality and thus the time for a recommended oil change.” The complaint alleges it allow drivers to travel too far with inadequate lubricity, wearing out and damaging engine components.

Oil also migrates to foul the spark plugs, which can result in a weak spark or no spark at all, the complaint says, leading to potential engine misfires and shutdowns.

All these problems, the complaint says, can “damage critical engine components and cause drivability problems” that can place those riding in the vehicle “at an increased risk of injury or death.”

The complaint alleges that over the years GM has only offered “stop-gap fixes” that do not provide a full remedy for the defect. It claims that GM has offered Technical Service Bulletins acknowledging the defect to dealers while providing no information to owners and lessees.

GM has since begun using a redesigned Generation V 5300 engine with features that the complaint says “confirm[] the prior defect[s.]”

Article Type: Lawsuit
Topic: Automobile

Most Recent Case Event

Chevrolet, GMC Vehicle Engines Excessive Oil Consumption Ohio Complaint

November 24, 2020

The complaint for this class action says General Motors, LLC vehicles equipped with the Generation IV 5.3 Liter V8 Vortec 5300 LC9 engines are “engineered to fail.” Why make such a spectacular statement? The complaint alleges that the engine has an oil consumption defect that leads to excess oil consumption in several ways, and that may also lead to engine damage, seizure, and stalling.

Chevrolet, GMC Vehicle Engines Excessive Oil Consumption Ohio Complaint

Case Event History

Chevrolet, GMC Vehicle Engines Excessive Oil Consumption Ohio Complaint

November 24, 2020

The complaint for this class action says General Motors, LLC vehicles equipped with the Generation IV 5.3 Liter V8 Vortec 5300 LC9 engines are “engineered to fail.” Why make such a spectacular statement? The complaint alleges that the engine has an oil consumption defect that leads to excess oil consumption in several ways, and that may also lead to engine damage, seizure, and stalling.

Chevrolet, GMC Vehicle Engines Excessive Oil Consumption Ohio Complaint
Tags: Defective Automobile, Engine Defects, Oil Use or Consumption