1. Background: What Is the CP4 Fuel Pump Issue in Silverado and Sierra Trucks?
CP4 Fuel Pump Silverado Sierra Lawsuit: Owners of certain Chevrolet Silverado and GMC Sierra trucks equipped with the 6.6L Duramax diesel engines (model years 2011–2016) encountered a serious problem: the Bosch CP4 high-pressure fuel pump was prone to premature failure. Plaintiffs in the class action lawsuit Chapman, et al. v. General Motors LLC argued that the pump was incompatible with U.S. diesel fuel standards, leading to accelerated wear and contamination of the fuel system with metal shavings.
These defects were alleged to result in catastrophic engine damage, necessitating costly repairs and replacements. Even though GM denied wrongdoing, the settlement indicates recognition of the gravity of the issue.
2. Overview of the Class Action Lawsuit and Settlement
The class action lawsuit, Chapman v. General Motors LLC (Case No. 2:19-cv-12333-TGB-DRG), targeted GM over the defective CP4 fuel pumps. The settlement, estimated between $35 million to $50 million, includes compensation for owners who incurred out-of-pocket expenses due to pump repairs.
According to Top Class Actions, the settlement remains in progress, allowing eligible owners to file claims based on their repairs.
The Sun reports that owners may receive up to $12,700 for past repair costs, depending on their claim
3. Who Qualifies? Eligibility Criteria for the CP4 Fuel Pump Lawsuit
Owners are potentially eligible if they meet these conditions:
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Ownership of a 2011–2016 Chevrolet Silverado or GMC Sierra with the 6.6L Duramax diesel engine, purchased from a GM-authorized dealer in California, Florida, Illinois, Iowa, New York, Pennsylvania, or Texas, between March 1, 2010, and September 13, 2024.
To confirm eligibility, truck owners can use the VIN Lookup tool provided on the settlement website.
4. Compensation: What Truck Owners Can Expect
Past Repairs
Owners who paid out of pocket for CP4 fuel pump repairs may receive between $6,356 and $12,712, depending on claim volume.
Former Owners
Those who no longer own the vehicle (and did not pay for repairs) may qualify for pro rata payments, estimated between $400 and $800.
Future Repairs
For repairs made on or after May 6, 2025, current owners may be reimbursed 50% of repair costs at GM-authorized dealerships. This provision extends until May 6, 2026, or until the truck reaches 200,000 miles, whichever comes first.
5. How to File a Claim: Step-by-Step Guide
To submit a claim for compensation:
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Verify eligibility via the VIN Lookup tool on the settlement site.
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Gather documentation:
- Proof of Purchase from GM-authorized dealer (purchase agreement or financing documents).
- Proof of Repair if you paid out-of-pocket before May 6, 2025. Include invoices and payment statements.
- Proof of Sale if you no longer own the truck (name, VIN, sale date, buyer info).
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Submit your Claim:
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Use the “File a Claim” option online on the settlement site.
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Deadlines
- Exclusion or objection deadline: December 12, 2024.
- Claim submission deadline for cash payouts: November 6, 2025
- Final hearing scheduled for January 21, 2025.
- Expected claim deadline: Around July 21, 2025.
6. What’s Next & Key Takeaways for Affected Truck Owners
Act promptly: Understand eligibility, compile documentation, and file before deadlines to receive compensation.
GM denies wrongdoing, but the settlement offers financial relief without admission of liability.
Future repair coverage provides an extended safety net for owners who may face additional CP4 failures.
Stay informed: Monitor official settlement updates and timelines for payments and claims.
Conclusion
The CP4 fuel pump Silverado Sierra lawsuit stems from critical failures tied to the Bosch CP4 pump in 2011–2016 Duramax diesels. Multiple owners claimed that GM knew of the defect but did not properly disclose it—causing extensive and expensive engine damage.
The resulting $35–$50 million settlement offers $6,300 to $12,700 for past repairs, pro rata payouts for former owners, and coverage for future failures at 50% cost share.
If you own (or once owned) an affected Silverado or Sierra, it’s vital to use the VIN lookup tool, gather your paperwork, and submit a claim before the July 2025 deadline.
