Have you owned a Chevrolet Silverado or GMC Sierra diesel truck only to face a sudden breakdown and a hefty repair bill? The CP4 fuel pump lawsuit settlement might offer you relief. General Motors (GM) has agreed to a $35 million settlement to compensate owners of 2011–2016 Silverado and Sierra trucks with defective Bosch CP4 fuel pumps. These pumps allegedly caused catastrophic failures, leaving drivers stranded and facing repair costs up to $12,000. If you’re affected, consulting a consumer law attorney can help you claim your share. This blog explores the CP4 fuel pump lawsuit in 2025, detailing allegations, settlement terms, how to file a claim, and what it means for you.
What Is the CP4 Fuel Pump Issue?
The Bosch CP4 high-pressure fuel pump was installed in 2011–2016 Chevrolet Silverado and GMC Sierra trucks equipped with 6.6L Duramax diesel engines (LML or LGH). Marketed for efficiency, the CP4 pump was allegedly incompatible with U.S. diesel fuel, which is less lubricated than European diesel. This mismatch caused:
- Pump Failure: Internal components rubbed, creating metal shavings that contaminated the fuel system.
- System Damage: Debris damaged injectors, fuel lines, rails, and tanks, often requiring replacements costing $8,000–$12,000.
- Safety Risks: Sudden engine shutdowns left drivers stranded, sometimes on highways.
Why It Matters: Owners like YouTuber “Tactical Overland” (2025) reported fearing their trucks were “ticking time bombs,” waiting for the CP4 to fail and send “metal shrapnel” through the fuel system. The settlement addresses these costly repairs.
For similar automotive defect cases, see our blog on Toyota/Subaru lawsuit.
Background of the CP4 Fuel Pump Lawsuit
The CP4 fuel pump lawsuit, Chapman v. General Motors LLC (Case No. 2:19-cv-12333, E.D. Mich.), began in 2019 when owners alleged GM knowingly sold trucks with defective CP4 pumps. Key points include:
- Allegations: Plaintiffs claimed GM was aware the CP4 pump was “unreasonably fragile” due to U.S. diesel’s lower lubrication but continued sales without disclosure, violating consumer protection laws.
- Affected Vehicles: 2011–2016 Silverado and Sierra diesel trucks with 6.6L Duramax engines, purchased from GM-authorized dealers in California, Florida, Illinois, Iowa, New York, Pennsylvania, or Texas between March 1, 2010, and September 13, 2024.
- GM’s Defense: GM denied wrongdoing, claiming no design flaw existed and blaming failures on “contaminated fuel.” However, a 2016 technical service bulletin (TSB 16-NA-102) showed GM’s awareness of pump issues.
- Settlement: In 2024, GM agreed to a $35 million settlement to avoid prolonged litigation, with final approval scheduled for January 21, 2025.
Community Sentiment: Reddit’s r/Duramax community (2024) celebrated the settlement as “good news” but criticized GM’s state restrictions, with users like u/hsfredell noting owners in states like Oregon were excluded despite identical issues. X posts echoed frustration, with some calling GM “bogus” for limiting eligibility.
Key Allegations in the CP4 Lawsuit
The lawsuit, consolidated from multiple class actions (e.g., Berry v. Bosch, Moonan v. GM), centered on several claims:
- Defective Design:
- The CP4 pump’s internal parts lacked sufficient lubrication with U.S. diesel, causing metal shavings to spread, per Hagens Berman (2023).
- Repairs often exceeded $10,000, as noted by YouTuber Tactical Overland, who questioned if all pumps would “blow at some point.”
- GM’s Knowledge:
- Plaintiffs alleged GM knew of the defect since 2011 but sold trucks without warning consumers, per court documents.
- A Reddit user (u/Danep21) highlighted GM’s silence, forcing owners to pay for repairs.
- Consumer Harm:
- Owners faced out-of-pocket costs for non-warranted repairs, with some, like a 2013 Duramax owner on Reddit, paying $8,773.
- Former owners suffered reduced resale value due to the defect’s reputation.
- Safety Concerns:
- Pump failures caused sudden engine shutdowns, posing risks on roads, as alleged in the lawsuit.
Expert Insight: “This settlement holds GM accountable for a known defect,” says attorney Steve Berman of Hagens Berman. “Consumers deserve safe, reliable vehicles.”
Compare this to our Omega XL lawsuit blog for another case of consumer protection.
Details of the $35 Million Settlement
The settlement, valued at $35 million (originally reported as $50 million, with $15 million for legal fees), offers relief to eligible owners:
- Repair Fund ($30M):
- Owners who paid out-of-pocket for CP4 repairs (not covered by warranty) can claim $6,356–$12,712, depending on claim volume and documented costs.
- Example: A California owner who paid $9,000 for repairs could recover most or all of it.
- Former Owner Fund ($5M):
- Former owners who sold their trucks without repair costs can claim $400–$800, based on claim numbers.
- Future Warranty:
- Current owners get a 12-month warranty (from May 6, 2025, or until 200,000 miles) covering 50% of CP4 repair costs at GM dealers, estimated at ~$5,000.
- Tactical Overland criticized this as a “terrible deal,” preferring a lump-sum payment over partial reimbursement.
- Eligibility:
- Applies to 2011–2016 Silverado/Sierra diesel trucks with 6.6L Duramax engines, bought from GM dealers in California, Florida, Illinois, Iowa, New York, Pennsylvania, or Texas (March 1, 2010–September 13, 2024).
- Verify eligibility using the VIN lookup tool at www.gmfuelpumplitigation.com.
- Deadlines:
- Claim Deadline: July 21, 2025 (six months after final approval).
- Opt-Out/Objection Deadline: December 12, 2024.
- Final Approval Hearing: April 25, 2025 (rescheduled from January 21, 2025).
Impact: The settlement compensates thousands but excludes owners in other states, sparking debates on fairness, per Reddit discussions.
How to File a Claim in the CP4 Settlement
If you’re eligible, follow these steps to claim compensation:
- Verify Eligibility:
- Visit www.gmfuelpumplitigation.com and use the VIN lookup tool to confirm your truck qualifies.
- Ensure purchase was from a GM dealer in California, Florida, Illinois, Iowa, New York, Pennsylvania, or Texas (2010–2024).
- Gather Documentation:
- Collect repair invoices, proof of payment, proof of ownership/lease, and VIN details.
- Example: Tactical Overland noted his 2015 LML qualified after verifying purchase from an Iowa dealer.
- Submit Claim:
- File online at www.gmfuelpumplitigation.com or mail a paper form to GM Fuel Pump Settlement, c/o JND Legal Administration, PO Box 91445, Seattle, WA 98111.
- Deadline: July 21, 2025. For future repairs (post-May 6, 2025), submit within 60 days of repair.
- Consult an Attorney:
- A consumer law attorney can ensure your claim is valid and maximize recovery, especially for high repair costs.
- Firms like Hagens Berman or Valero Law offer free consultations.
Tip: Act promptly, as missing the July 2025 deadline could forfeit your claim. See our Trump lawsuits blog for class action tips.
What Should Silverado and Sierra Owners Do?
Beyond filing a claim, consider these actions:
- Monitor Your Vehicle: If your CP4 pump hasn’t failed, watch for signs like rough idling or power loss. Tactical Overland’s 150,000-mile truck hadn’t failed, but he feared it might.
- Explore Upgrades: Some owners, like Tactical Overland, converted to CP3 pumps to avoid future issues, though this voids settlement eligibility.
- File Complaints: Report issues to the NHTSA (nhtsa.gov) or your state attorney general to support broader investigations.
- Stay Informed: Check www.gmfuelpumplitigation.com for updates, as Reddit users noted delays in approval hearings.
Expert Advice: “Document everything,” says attorney Joshua Valero. “Strong evidence strengthens your claim.”
Implications for the Automotive Industry
The CP4 lawsuit has wider impacts:
- Increased Accountability: Settlements like this pressure manufacturers to disclose defects, per Counsel Stack (2025).
- Regulatory Scrutiny: The NHTSA may tighten oversight of diesel components, especially after similar CP4 issues with Ford/FCA (web:14).
- Consumer Awareness: Owners are more cautious, researching recalls before buying, as seen in r/Duramax discussions.
Industry Warning: “This case shows defects can’t be hidden,” says attorney Jerrod Patterson. Other brands with CP4 pumps may face lawsuits, per Tactical Overland’s video.
Why Consult a Consumer Law Attorney?
Navigating the settlement can be tricky. An attorney can:
- Verify your eligibility and documentation.
- File claims to meet deadlines.
- Maximize compensation, especially for high repair costs.
Expert Opinion: “Legal guidance ensures you don’t miss out,” says attorney Sean Matt of Hagens Berman. Contact a law firm for a free consultation today.
The CP4 fuel pump lawsuit settlement 2025 offers hope for Chevrolet Silverado and GMC Sierra owners hit with costly repairs. GM’s $35 million settlement addresses defective CP4 pumps that caused engine failures, but only for specific states and owners. By verifying eligibility, gathering evidence, and filing by July 21, 2025, you can claim up to $12,712. Don’t let GM’s oversight cost you—consult a consumer law attorney to secure your rights. Share your CP4 experiences below, and stay tuned for settlement updates!
Sources
- YouTube: “GM CP4 Fuel Pump Lawsuit Settlement…What To Do ?? – Tactical Overland” (youtube.com/watch?v=Qhn86WDVinQ, 2025)
- Reddit: “GM $34m Settlement for Defective CP4’s” (reddit.com/r/Duramax/comments/1fu7b00, 2024)
- GM Fuel Pump Litigation: “Home | Chapman v. General Motors, LLC” (gmfuelpumplitigation.com, 2025)
- Counsel Stack: “CP4 Fuel Pump Silverado Sierra Lawsuit” (counselstack.com, 2025)
- Union Rayo: “General Motors Confirms – Will Pay $35 Million” (unionrayo.com, 2025)
- Car Complaints: “GM Diesel Fuel Pump Class Action Lawsuit Settlement Final” (carcomplaints.com, 2025)
- Hagens Berman: “GM/Ford/FCA CP4 Fuel Pump Class-Action Litigation” (hbsslaw.com, 2023)
- Valero Law: “General Motors Diesel Fuel Pump Class Action Lawsuit Settlement Finalized” (valerolaw.com, 2025)
