Received notice about the California, Idaho, and North Carolina class action settlement, Siqueiros et al. v. General Motors LLC? Click here
Settlement Information
A settlement has been reached between General Motors LLC (“Defendant” or “GM”) and Durwin Hampton (“Class Plaintiff”), individually and on behalf of the Settlement Class. The case is known as Hampton v. General Motors LLC, and the case number is 6:21-cv-250-GLJ. Judge Gerald L. Jackson of the United States District Court for the Eastern District of Oklahoma is overseeing this lawsuit (the “Court”).
Plaintiffs allege that the LC9 Engines in the Class Vehicles contain an inherently defective piston assembly and that the defect causes excessive engine wear in every Class Vehicle. Plaintiffs allege that excessively worn piston rings leads to excessive oil consumption, which causes spark plug fouling, rough idling, rough acceleration, check engine light activation, engine shutdown commands from the instrument cluster, oil loss/burn and may eventually lead to permanent engine damage or shutdown.
Plaintiffs further allege that GM was aware of the alleged defect and they seek to recover economic damages. Plaintiffs are not pursuing claims for personal injuries or damage to other property.
GM denies any wrongdoing or liability for the claims alleged and specifically denies that any Class Vehicle is defective.
Who Is a Class Member?
The Settlement Class includes all current owners or lessees as of September 26, 2024 of a Class Vehicle that was purchased or leased in the State of Oklahoma.
The Class Vehicles are 2011-2014 Chevrolet Avalanches, 2011-2014 Chevrolet Silverados, 2011-2014 Chevrolet Suburbans, 2011-2014 Chevrolet Tahoes, 2011-2014 GMC Sierras, 2011-2014 GMC Yukons, and the 2011-2014 GMC Yukon XLs with LC9 engines manufactured on or after February 10, 2011. Any vehicle that has already received adequate piston replacement (i.e., upgraded piston rings) under warranty and at no cost is excluded from the Class.
Your Legal Rights and Options
Option and Deadline |
Your Legal Rights |
Identification Forms onlyBy July 28, 2025 |
If you received a Class Member Identification Notice by mail or email instructing you to identify that you are a Class Member, you must complete the form by July 28, 2025 to be eligible to receive a payment. If you are unsure what notice you received and what action, if any, you need to take, you can verify using the “Class Member Identification Form” link here by entering your Notice ID. |
Do nothing |
If you did not receive a Class Member Identification Notice, you will receive a direct payment and give up certain rights.
By doing nothing, you will stay in the Class and, if the Settlement is approved, you will receive a pro rata share of a $24,833,000 settlement. You will give up any right you may have to sue the defendant separately regarding any Claims that this Settlement resolves. |
Ask to be excludedBy July 28, 2025 |
Opt-out of the Settlement, receive no benefits from it, and retain your claims.
You may ask to be excluded from the Settlement, in which case you will not receive a Settlement Payment, and your individual claims will not be released. But if you ask to be excluded, you cannot obtain compensation from the Settlement. Opt-out requests must be mailed to the Settlement Administrator, postmarked or received by July 28, 2025. Refer to FAQ 14 for detailed instructions on how to exclude yourself from the Settlement. |
objectBy July 28, 2025 |
Tell the Court why you believe the proposed Settlement is unfair, unreasonable, or inadequate.
You may mail to the Court a written objection, postmarked no later than July 28, 2025, and/or request to appear at the Final Approval Hearing on September 15, 2025, at 11:00 a.m. CST, to tell the Court why you believe the proposed Settlement is unfair, unreasonable, or inadequate. Refer to FAQ 17 for detailed instructions on how to object to the Settlement. |
Dates and Deadlines
Identification Deadline July 28, 2025 Exclusion Deadline July 28, 2025 Objection Deadline July 28, 2025 Final Approval Hearing September 15, 2025