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Hampton v. General Motors LLC - Oklahoma GM Engine Litigation

Pro rata share of $24,833,000 settlement

This settlement is closed to new claims — the deadline was September 15, 2025. You can still see what it was about and follow the case in court below. Looking for money you can still claim? Browse open settlements →

What happened

General Motors sold 2011-2014 Chevrolet and GMC vehicles equipped with LC9 5.3 Liter V8 engines that allegedly contain a defective piston assembly causing excessive engine wear, oil consumption, spark plug fouling, rough idling, and potential engine damage. GM denies any wrongdoing but has agreed to settle the case.

Do you qualify?

Current owners or lessees as of September 26, 2024 of 2011-2014 Chevrolet Avalanche, Silverado, Suburban, or Tahoe, or 2011-2014 GMC Sierra, Yukon, or Yukon XL vehicles equipped with LC9 engines manufactured on or after February 10, 2011, that were purchased or leased in Oklahoma. Vehicles that already received upgraded piston rings under warranty are excluded.

How to file

If you received a Class Member Identification Notice, complete the identification form by September 15, 2025. If you did not receive such a notice, you automatically receive a pro rata share of the settlement by doing nothing. Payments are being distributed via check or direct deposit based on W-9 submission; allow up to 14 days for delivery. Contact info@OklahomaGMEngineLitigation.com with questions.

Common questions

How much does the Hampton v. General Motors LLC - Oklahoma GM Engine Litigation pay?
Estimated payout: Pro rata share of $24,833,000 settlement. The total settlement fund is $24.8M. Actual amounts depend on how many valid claims are filed — most settlements divide a fixed fund pro rata, so a higher claim rate means a smaller individual check. An "up to" figure is a cap, not a guarantee.
What is the claim deadline for the Hampton v. General Motors LLC - Oklahoma GM Engine Litigation?
This settlement is closed to new claims — the deadline was September 15, 2025. Once a claim deadline passes you generally forfeit your share, even if you qualified.
Do I need proof of purchase for the Hampton v. General Motors LLC - Oklahoma GM Engine Litigation?
Yes. This settlement asks for documentation supporting your claim — a receipt, an account record, or the notice you were sent. Check the official settlement website for exactly which documents are accepted.
Is the Hampton v. General Motors LLC - Oklahoma GM Engine Litigation notice real, or a scam?
Postlethwaite & Netterville is the settlement administrator for this case. Claims are filed at oklahomagmenginelitigation.com. Filing a class action claim is always free — no legitimate settlement charges you to claim, and no administrator will ask for payment, a gift card, or your full Social Security number by email or text. If a notice asks for any of those, it is not from the administrator. When in doubt, ignore the link you were sent and go to the official settlement website directly.
When will payments from the Hampton v. General Motors LLC - Oklahoma GM Engine Litigation be sent?
Class action payouts typically take 12 to 24 months after the claim deadline, and longer if the settlement is appealed. The final approval hearing for this case is set for September 15, 2025; no payments can be issued before a settlement receives final approval.

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This summary was generated from public settlement documents and may contain errors. Confirm eligibility, deadlines, and payment terms on the official settlement website before filing. ClaimWatch is not a law firm and this is not legal advice. Filing a claim is free.

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