Nature of the Case

The Court certified a class action lawsuit and your rights may be affected. The lawsuit alleges defects in certain 2011-2014 Chevrolet Avalanche, Silverado, Suburban, Tahoe, and GMC Sierra, Yukon, and Yukon XL vehicles equipped with Generation IV LC9 5.3 Liter V8 Vortec 5300 engines (“LC9 Engines”). Judge Charlotte N. Sweeney of the United States District Court for the District of Colorado is overseeing this lawsuit. The lawsuit is known as White. v. General Motors, LLC, and the case number is 1:21-cv-00410-CNS-MEH. No judgment or settlement has occurred at this time.

Am I in a Class?

The “Class Vehicles” are: 2011-2014 Chevrolet Avalanche, 2011-2014 Chevrolet Silverado, 2011-2014 Chevrolet Suburban, 2011-2014 Chevrolet Tahoe, 2011-2014 GMC Sierra, 2011-2014 GMC Yukon, and 2011-2014 GMC Yukon XL manufactured on or after February 10, 2011 that was equipped with a Generation IV 5.3-Liter V8 Vortec 5300 LC9 engine. Any vehicle that has received free upgraded piston rings under warranty is excluded from the class. Class members are all purchasers and lessees of a Class Vehicle who purchased or leased a Class Vehicle in the State of Colorado.


Option and Deadline

Your Legal Rights

Ask to be excluded BY

April 5, 2024

If you do not want to participate in the Class, you can exclude yourself by mailing a request for exclusion by April 5, 2024. This is the only option that allows you to retain any rights you may have against GM over the claims in this case.  You must send your written request for exclusion to the address listed below:

GM 5300 LC9 Colorado Class Action
P.O. Box 3314
Baton Rouge, LA 70821

If you decide you do not want to participate in the Class and you do not make a timely request for exclusion as described above, you will still be bound by the jury’s verdict, should the case go to trial.

Do Nothing at this time


If you wish to remain in the class, you do not need to do anything at this time.


Dates and Deadlines

Exclusion Deadline

April 5, 2024

Trial Date