CP4 Fuel Pump Silverado Sierra Lawsuit: How Can You Claim Your Settlement Amount?

• The class action lawsuit Chapman, et al. v. General Motors LLC, Case No. 2:19-cv-12333-TGB-DRG, has reached a tentative settlement.
• You must have purchased a 2011–2016 Chevrolet Silverado or GMC Sierra with a 6.6L Duramax diesel engine from a GM-authorized dealer between March 1, 2010, and September 13, 2024, in order to be eligible for settlement benefits.
• For Class Members who paid for the CP4 fuel pump repairs out of pocket and for Class Members who no longer own their truck or trucks and did not pay for a fuel pump repair, the Settlement offers a cash settlement.

Do you own or once owned a 2011–2016 Chevrolet Silverado or GMC Sierra with a 6.6L Duramax diesel engine? If so, then you might be eligible for money from the CP4 Fuel Pump Silverado Sierra lawsuit settlement.

For those who don’t know, General Motors (GM) has agreed to pay out $35 million! Why? Well, in order to settle claims that certain fuel pumps in these trucks were defective and caused serious engine problems.

If you want to know whether you are eligible to file a claim and get a part of this settlement amount, then you have come to the right place.

Hi. In today’s blog, I will explain what this lawsuit is all about and by when you can claim your settlement amount. So, if these are some of the things that you want to know, keep on reading this blog till the end, and thank me later…

What Is the Bosch CP4 Fuel Pump and Why Did It Fail?

The Bosch CP4 (and its variant CP4.2) is a high-pressure, cam-driven fuel injection pump used on modern diesel engines for direct fuel injection. It was designed to be more fuel-efficient than its predecessor, the CP3, by generating higher pressure with less fuel volume.

But why was it prone to fail in the U.S. diesel applications?

European diesel fuel historically contained higher sulfur levels, which provided more lubrication.

In contrast, ultra-low-sulfur diesel commonly used in the U.S. offers less lubrication, leading to internal wear, air entrapment, and premature failure of the CP4 pump.

According to For The People, in many cases, this failure produced metal debris that contaminated fuel lines, injectors, and engine components. And this is potentially causing catastrophic engine failure.

Once the CP4 fails and dumps metal shavings into the fuel system, the damage can be extensive. Additionally, repairs often require full system flushes and multiple component replacements, with costs ranging between $10,000 and $15,000.

What Is The CP4 Fuel Pump Silverado Sierra Lawsuit About?

A federal class-action—Chapman, et al. v. General Motors LLC —accused GM of equipping 2011–2016 Silverado and Sierra trucks with defective CP4 pumps. And that this is something that led to dangerous engine failures and exorbitant repair costs.

As per the reports by Car Complaints, compared to European diesel fuel, American diesel fuel is reportedly cleaner and offers less lubrication.

According to the GM lawsuits, metal shavings and other particles are produced when the fuel pumps run dry and pass through the engines and fuel systems.

As a result, the plaintiffs came together to file a class action lawsuit against General Motors. In their complaint, the affected party states that the repair cost for such faulty GM trucks can “cost up to $15,000.”

Additionally, in their claim, they also mentioned that GM was already aware of the defects in their pumps from the very beginning.

What Was General Motor’s Response To The Allegations?

GM did not admit fault—which is pretty standard in class action cases. However, they agreed to settle the lawsuit to avoid dragging things out in court.

The settlement amount is $35 million, which will be distributed among eligible truck owners and former owners.

What you’ll get depends on your situation, such as:

• Whether you still own the vehicle
• Whether you paid for repairs
• When the repairs happened
• How many people file claims

What Is The Settlement Amount In the CP4 Fuel Pump Silverado Sierra Lawsuit?

As I have already mentioned at the very beginning, the settlement amount that GM has agreed upon is a massive $35 million.

Here’s a breakdown of the settlement amount that you need to know about:

• Reimbursement for Past Repairs: If you already paid to fix the CP4 fuel pump, you could receive $6,356 to $12,712, depending on how many people file.
• Compensation for Former Owners: If you used to own one of the trucks but didn’t pay for repairs, you can still get $400 to $800 in compensation.
• Partial Reimbursement for Future Repairs: Still own the truck? If you have to fix the CP4 fuel pump on or after May 6, 2025, GM will reimburse you for 50% of the repair costs, as long as it’s done at a GM-authorized dealer. This coverage lasts until May 6, 2026, or 200,000 miles, whichever comes first.

Now, here’s something that you need to know about the settlement agreement.

If Diesel truck owners who paid for CP4 fuel pump repairs from their own pockets are confirmed, they might be compensated for that expense.

The money-back offer is available to both past and present vehicle owners. Still, the sum of the refund will depend on how many GM customers submit qualifying claims together with supporting documents.

Car Complaints also stated that to claim for reimbursement, it is important that “the problems must have been caused by metal fuel pump parts that rubbed together, created metal shavings, contaminated the Duramax diesel fuel system, and caused catastrophic engine failure.”

In the case of a lawsuit, members of the class who no longer have trucks and did not pay for CP4 repairs out-of-pocket may get some money, but the amount will depend on how many customers file claims and submit supporting documentation.

Eligibility To Claim CP4 Fuel Pump Silverado Sierra Lawsuit Settlement Amount

If you want to ensure that you get a part of the money, you need to check whether to qualify for the settlement amount. So, what about the eligibility for the CP4 Fuel Pump Silverado Sierra Lawsuit settlement?

To qualify, you must be able to meet the following requirements in terms of your vehicle as well as your purchase:

• Vehicle: 2011–2016 Chevrolet Silverado HD or GMC Sierra HD with the 6.6L Duramax (LML) diesel engine and a Bosch CP4 pump
• Purchase: Must have bought it from a GM-authorized dealer in one of the seven named states—from March 1, 2010, to September 13, 2024.

The final approval to this lawsuit settlement was granted on May 6, 2025. Additionally, the deadline for filing this claim is set to be November 6, 2025, for both past repair reimbursement and former-owner claims.

According to the GM Fuel Pump Litigation website, here are the documents that are required for filing this claim:

• Proof of Purchase: Dealer purchase documents showing you, dealer, vehicle, and date.
• Proof of Repair: Repair invoices or payment records identifying the CP4 pump or components referenced in GM TSB 16-NA-102.
• Proof of Sale (for former owners): Sale documents with date of sale, VIN, seller, and buyer info.

For more information, it is best that you keep checking the website.

How To File A Claim In The CP4 Fuel Pump Silverado Sierra Lawsuit?

If you are eligible to file a claim and get a part of the settlement amount, it is best that you know how to file your claim. Here are the steps that you should follow to claim your settlement amount successfully:

• Visit the official settlement site and use the VIN lookup tool to confirm eligibility.
• Download or submit the Claim Form online, depending on whether you’re a current owner with repairs or a former owner.
• Gather and submit required documentation (purchase, repair, or sale proof) by November 6, 2025.
• For future repair reimbursement, if you repair on or after May 6, 2025, submit a Reimbursement Request within 60 days of the repair.

Remember One Thing: You need to follow the statute of limitations. This means that, by no means, you should not miss the deadline.

If you do, you will be ineligible for the settlement funds. Additionally, this would automatically exclude you from getting any sort of reimbursement for future repairs.

Important Deadlines In The CP4 Fuel Pump Silverado Sierra Lawsuit

Here are some of the most important dates that you need to keep in mind when dealing with the CP4 Fuel Pump Silverado Sierra lawsuit:

Frequently Asked Questions:

Here are some of the questions that most people often ask about the CP4 Fuel Pump Silverado Sierra Lawsuit. Take a look at them before you leave:

1. Do I Need A Lawyer To File A Claim?

No, you can file a claim on your own by visiting the official settlement website and filling out the form. But if you’re confused, talking to a consumer rights lawyer might help.

2. What Documents Do I Need To Submit A Claim?

You’ll usually need proof of ownership, repair receipts, or sale records. If you’re claiming for a future repair, keep all receipts from the GM-authorized dealership.

3. What If I Bought My Truck Outside Of The Listed States?

Unfortunately, the current settlement only covers trucks purchased in California, Florida, Illinois, Iowa, New York, Pennsylvania, and Texas. If you’re outside these states, you’re not included.

4. Will This Affect My Current Warranty?

No, this settlement is in addition to any existing warranty you may have. It offers extra protection specifically for CP4 fuel pump issues.

5. When Will I Get My Payment?

Payouts will be issued after the settlement is approved by the court and all claims are reviewed. This could take several months, so keep an eye on your email or mail for updates.

How Has The CP4 Fuel Pump Silverado Sierra Lawsuit Influenced The Industry?

This lawsuit is part of a growing trend where consumers are holding automakers accountable for defects that lead to massive repair costs. Some major impacts include:

• Increased pressure on auto companies to test fuel systems thoroughly.
• Clearer warranty disclosures and expectations.
• Other lawsuits against CP4 fuel pump manufacturers are gaining traction.
• More class action suits are being filed against similar diesel trucks with CP4 issues.
• Companies are settling cases faster to avoid bad publicity.

This settlement is of great help financially to the people who have been deeply affected, particularly if the damage has been more than $10,000.

Owners who qualify can get back an amount of money, which can be in the thousands of dollars, and a kind of home insurance for the near future.

“The settlement also establishes a 12-month warranty extension to cover 50% of repair costs for trucks with less than 200,000 miles. These payments may be around $5,000 but will vary depending on the actual repair costs,” states Top Class Actions.

This lawsuit is a good example of a situation where a part that was made for car fuels meeting European standards can break down in different conditions, whereby the main point of the conversation is the need for ensuring rigorous compatibility when it comes to the global market.

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