Received notice about the Oklahoma class action settlement, Hampton v. General Motors LLC? Click here
Settlement Information
A settlement has been reached between General Motors LLC (“Defendant” or “GM”) and Garret Tarvin, Gabriel Del Valle, and William Davis, Jr. (“Class Plaintiffs”), individually and on behalf of the Settlement Classes. The case is known as Siqueiros et al. v. General Motors LLC, and the case number is 3:16-cv-07244-EMC. Judge Edward M. Chen of the United States District Court for the Northern District of California 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 Court certified three Classes in this case and defined the Classes as follows:
- California Class. All current owners or lessees of a Class Vehicle that was purchased or leased in new condition in the State of California as of May 23, 2022.
- North Carolina Class. All current owners or lessees of a Class Vehicle that was purchased or leased in the State of North Carolina as of May 23, 2022.
- Idaho Class. All current owners or lessees of a Class Vehicle that was purchased or leased from a GM-authorized dealer in the State of Idaho as of May 23, 2022.
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 Classes. Additionally, anyone who previously requested to be excluded from the Class, after the notice sent on or around May 23, 2022, is not a part of the Settlement Classes and will not be eligible to receive compensation under the Settlement or object to the Settlement or its terms.
Your Legal Rights and Options
Option and Deadline |
Your Legal Rights |
NORTH CAROLINA Identification Forms onlyBy August 8, 2025 |
If you received a North Carolina Class Member Identification Notice by mail or email instructing you to identify that you are a Class Member, you must complete the form by August 8, 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 North Carolina 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 $150,000,000 settlement. You will give up any right you may have to sue the defendant separately regarding any Claims that this Settlement resolves. |
objectBy August 8, 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 August 8, 2025, and/or request to appear at the Final Approval Hearing on October 2, 2025, at 1:30 p.m. PT, to tell the Court why you believe the proposed Settlement is unfair, unreasonable, or inadequate. Refer to FAQ 18 for detailed instructions on how to object to the Settlement. |
Dates and Deadlines
Identification Deadline August 8, 2025 Objection Deadline August 8, 2025 Final Approval Hearing October 2, 2025