Chevy and GMC Vehicles Excessive Oil Consumption Class Action

This class action brings suit against General Motors, LLC for the Generation IV Vortec 5300 engines in many of its 2010-2014 vehicles. The complaint alleges that the engine consumes excessive amounts of oil and that monitoring systems do not properly inform owners when the amount of oil in the vehicle is insufficient.

The Nationwide Class for this action is all current and former owners or lessees of a class vehicle that was bought in the US. The class vehicles include the following:

  • 2010–2014 Chevrolet Avalanche;
  • 2010–2013 Chevrolet Silverado;
  • 2010–2014 Chevrolet Suburban;
  • 2010–2014 Chevrolet Tahoe;
  • 2010–2013 GMC Sierra;
  • 2010–2014 GMC Yukon; and
  • 2010–2014 GMC Yukon XL.

According to the complaint, “[m]ultiple factors contribute to the excessive oil consumption problem” in the engines. They were first installed in certain 2007 vehicles and have continued to be used in later vehicles.

The first problem, the complaint alleges, is that “the piston rings that GM installed within the Generation IV Vortec 5300 Engines do not maintain sufficient tension to keep oil in the crankcase.”

Second, the complaint says the Active Fuel Management (AFM) system “comprises an oil pressure relie[f] valve that assists the AFM system by spraying oil directly at the piston skirts. This oil spray overloads and fouls the defective piston rings, triggering oil migration past the rings. The migrating oil either burns or accumulates as carbon buildup on the combustion chamber’s surfaces.”

Third, the engines have “a flawed PVC system that vacuums oil from the valvetrain into the intake system, where it is ultimately burned in the combustion chambers.”

Fourth, the vehicles’ Oil Life Monitoring System does not monitor actual oil levels, the complaint says, but “engine conditions, such as revolutions and temperature, to calculate the expected deterioration in oil quality…” The complaint alleges that this causes drivers to drive too far “with inadequate engine lubricity levels, wearing out and damaging components…”

The complaint claims that the oil pressure gauge also “does not provide any indication as to when the oil pressure … falls to levels low enough to damage internally lubricated parts or cause engine failure. Nor does the oil canister symbol illuminate until well past the time” when the vehicle needs oil.

Finally, the complaint alleges that the oil migration problem “fouls spark plugs no matter how often drivers top off their oil levels.” These “oil-fouled spark plugs produce an anemic/weakened spark, an intermittent spark and/or no spark at all—causing engine misfires and shutdown events.”

The complaint claims that GM has long known about these defects but has failed to warn customers. Not only that; the complaint alleges that it has tried to deal with the problem through stop-gap measures that do not really remedy the problem.

According to the complaint, GM has stopped using these engines and has replaced them with a redesigned Generation V Vortec 5300 engine. However, this has done nothing for those who still have the earlier engine.

Article Type: Lawsuit
Topic: Automobile

Most Recent Case Event

Chevy and GMC Vehicles Excessive Oil Consumption Complaint

February 25, 2020

This class action brings suit against General Motors, LLC for the Generation IV Vortec 5300 engines in many of its 2010-2014 vehicles. The complaint alleges that the engine consumes excessive amounts of oil and that monitoring systems do not properly inform owners when the amount of oil in the vehicle is insufficient.

Chevy and GMC Vehicles Excessive Oil Consumption Complaint

Case Event History

Chevy and GMC Vehicles Excessive Oil Consumption Complaint

February 25, 2020

This class action brings suit against General Motors, LLC for the Generation IV Vortec 5300 engines in many of its 2010-2014 vehicles. The complaint alleges that the engine consumes excessive amounts of oil and that monitoring systems do not properly inform owners when the amount of oil in the vehicle is insufficient.

Chevy and GMC Vehicles Excessive Oil Consumption Complaint
Tags: Breach of warranty, Defective Automobile, Engine Defects, Fraudulent Concealment