If you bought a Chevrolet Silverado or GMC Sierra with a Duramax diesel engine between 2011 and 2016, you could be entitled to up to $6,700 in compensation—plus an extended warranty—thanks to a major class action settlement against General Motors.
After a lengthy legal battle, GM has agreed to a preliminary $50 million settlement over defective CP4 fuel pumps that were prone to failure in certain states. Let’s break down what happened, which vehicles are affected, and how you can claim your share of the compensation.
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What Sparked the Lawsuit?
A class action lawsuit revealed that GM installed Bosch CP4 fuel pumps in certain diesel models—despite knowing they weren’t compatible with the type of diesel fuel commonly sold in parts of the U.S.
This mismatch caused metal shards and debris to accumulate in the engine, often leading to catastrophic internal damage. Owners were left footing the bill for thousands of dollars in repairs.
The issue primarily affected diesel sold in California, Illinois, Iowa, Texas, New York, and Pennsylvania—states where the fuel has lower lubricity, which worsens wear on the CP4 pump.
Which Vehicles Are Impacted?
If you own any of the following trucks, you may be eligible for compensation:
- Chevrolet Silverado (2011–2016) with Duramax LML or LGH engines
- GMC Sierra (2011–2016) with Duramax LML or LGH engines
These vehicles were equipped with the faulty CP4 fuel pump, which wasn’t designed for U.S. diesel fuel standards in some regions.
What Did the Court Decide?
According to the court, GM knew about the defect during vehicle production but continued to sell the trucks anyway—putting profit over reliability. As a result, the judge approved a $50 million settlement to help reimburse drivers for repairs and related costs.
Important: GM has not admitted guilt, but they’ve agreed to the settlement to avoid a prolonged legal battle that could damage their brand.
How Much Money Can You Get?
Payouts will vary depending on the repairs you’ve had to make and the number of drivers who file claims, but:
- Average expected compensation is around $6,300 per person
- Some drivers may receive up to $6,700, depending on documented repair costs
- GM is also offering a 12-month extended warranty for future fuel pump issues
How Do You Know If You Qualify?
To check if your vehicle is eligible:
- Locate your Vehicle Identification Number (VIN)
- Visit the settlement site (linked in official notices) to check if your truck is included
- Gather repair invoices, service records, and proof of expenses related to the fuel system
The more documentation you have, the better your chances of a larger payout.
What Exactly Is a Class Action Lawsuit?
A class action lawsuit allows a group of people with the same complaint to take on a big company together. It’s especially useful when individual claims would be too small to fight alone.
In this case, thousands of truck owners joined forces to challenge GM. The result? A large-scale settlement designed to make things right (financially, at least).
Why Didn’t GM Admit Fault?
It all comes down to reputation.
If GM admitted that they knowingly sold vehicles with a defective fuel pump, it could severely damage their trustworthiness in the auto market—especially for their diesel truck lineup.
So, like many companies, GM chose the “no admission of liability” route: pay up, but don’t take the blame.
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What Happens Now?
The final approval hearing date hasn’t been announced yet. In the meantime:
- Check your eligibility
- Collect your documentation
- Stay tuned for official claim instructions and deadlines
Final Thought: Don’t Miss Out on What You’re Owed
If your Duramax-powered Silverado or Sierra falls within the affected years, this settlement could help cover past or future repairs. It’s time to pull out those old service receipts—you might be owed thousands.
Your faulty fuel pump might’ve been a headache—but now it could pay off.