cp4 fuel pump silverado sierra lawsuit
Introduction
When Volkswagen’s dirty diesel came to light, Americans were up in arms and rightly so since then, you’ve likely heard about the CP4 fuel pump lawsuit if you happen to own a Chevrolet Silverado or GMC Sierra of the Duramax diesel variety. This has angered further three thousand truck owners in the US. Some have suffered costly repair bills, engine failures and ongoing reliability woes. In this post, we’ll dive into the background, specifics and current status of the CP4 fuel pump Silverado Sierra lawsuit — and what it means for impacted owners.
What Is the CP4 Fuel Pump?
CP4 pump is a high-pressure fuel pump that serves multiple modern diesel engines. It replaced the simpler and more reliable CP3 pump in order to satisfy tougher emissions requirements.
But the system is not without its problems: the CP4 pump depends on diesel fuel as a lubricant, and less sulfur at the federal level has led to some expensive repairs. When the fuel is not lubricated properly, the metal parts rub against each other, resulting in internal wear and ultimately catastrophic failure.
Historical Overview of the CP4 Failure Issues
The issue began around 2011 when GM changed from CP3 to CP4 pumps in their Duramax 6.6L diesel engines. Almost right away, complaints began arising about the fuel pumps failing and causing the power to cut out without warning.
By 2020 hundreds of Silverado and Sierra owners had complained of the problem to NHTSA. The failures typically came without warning, stranding drivers and leaving them with repair bills of more than $8,000 to $12,000.
Why the CP4 Fuel Pump Fails
This is because of the fragile internal workings inside the pump. It was engineered for European diesel fuel that has a much superior lubricity as compared to American diesel. When operated with American fuel, the pump’s moving parts can grind together, producing metal shavings.
Throughout the entire fuel system, from injectors and fuel lines to the tank, these particle shavings contaminate everything and cause a complete failure of the system.
Impacts of Failure of Danfoss CP4 Fuel Injection Pump
The pump fails when can instantly stop the engine driving and put dangerous condition. Common symptoms include:
Sudden engine stalling
Loss of acceleration power
“Service Engine Soon” warning light
Hard starting or no-start condition
When it does, metal shavings are scattered throughout the system and replacing just the fuel pump isn’t enough; the fuel injectors, lines and tank must be replaced as well.
Silverado and Sierra Models Involved
The most affected models in the Silverado and Sierra lineup include:
2011–2016 Chevrolet Silverado 2500HD/3500HD
2011–2016 GMC Sierra 2500HD / 3500HD
These trucks are equipped with the LML Duramax diesel and it too is running the faulty CP4 pump.
General Motors’ Response
GM had initially resisted recalling the vehicles, arguing that the breakdowns were due to bad fuel rather than defective pumps. But the pressure from their customers and lawsuits eventually compelled them to release technical service bulletins (TSBs).
Despite these service bulletins, GM has not declared a recall or extended free repairs to all affected owners, causing feelings of anger and disillusionment among many who seek legal recourse.
The CP4 Fuel Pump Lawsuit
General Motors (GM) is facing a class action lawsuit over allegations it sold vehicles with bad fuel pumps. Plaintiffs maintain that GM concealed this defect, and unless vehicles were under warranty, it failed to pay the cost of repairs.
The suit requests money be repaid for costs of fixing the cars, diminished resale value and breaches of consumer protection regulations.
Legal Claims in the Lawsuit
The lawsuit contains a number of significant legal allegations, such as:
Express and implied warranty violation
State consumer protection laws violations
Negligent misrepresentation
Unjust enrichment
In essence, plaintiffs claim GM knew or should have known that U.S. diesel fuel was incompatible with the CP4 pump and that it was obligated to warn purchasers.
Who Can Join the CP4 Lawsuit?
Perhaps you own or lease a 2011–2016 Chevrolet Silverado or GMC Sierra truck with a Duramax 6.6L diesel engine and can take part in the case.
People who had to foot the bill for repairs, or whose cars were severely damaged, are especially urged to join the legal action.
Evidence Required for the Lawsuit
You may want (or need) to add to your complaint:
Vehicle purchase or lease documents
receipts to fix with CP4 pump going out
Any correspondence (emails) you’ve had with GM, or dealerships
Maintenance history and warranty claims
This proof tends to show ownership, care of the machine and monetary value of the defect.
Potential Compensation
If successful, plaintiffs could receive:
A full refund if you do not have a successful repair or replacement
Extended warranty coverage
Refunds for lost vehicle value
Special damages for inconvenience or hazard
Class-action settlements in similar automotive cases involving financial incentives to dealers have been in the thousands of dollars to tens of thousands of dollars per claimant.
GM’s Defense and Counterarguments
GM contends that fuel contamination — and not design defects — is responsible for CP4 failures. FSET says the pumps meet required standards when used with appropriate diesel fuel.
However, both point out that U.S. diesel in general lacks the lubricity for engines to run properly and if GM’s arguments had true merit one wouldn’t see failures everywhere.
How to Protect Your Vehicle
If your rig is still powered by a CP4 pump, just think about it:
Improving LUC with diesel addatives
Regular fuel filter changes
CP4 to CP3 conversion kits which replace the problem prone pump with a more reliable unit
These actions can go a long way toward preventing engine failure and costly shop visits.
What the Future Holds After Diesel Engine and Legal Cases
The cp4 fuel pump silverado sierra lawsuit class action lawsuit is proving to be one of the many lawsuits that are pointing out a lack of impartial and better engineering compatibility from car companies. That could subject manufacturers to more stringent oversight and testing requirements, the better to avert such scandals in future.
For diesel fans everywhere, here’s a reminder: Always do your homework on common problems before picking up a model for yourself.
Conclusion
Left hundreds and thousands Silverado and Sierra owners frustrated, facing a monumental repair bill, fighting against big auto in court…. Whether you’re involved in the suit or just now hearing about the problem, knowing your rights and taking steps to prevent future trouble could save you a lot of headaches.
Consumers hope for fair compensation and a lesson learned by large manufacturers as the legal fight rages on.
FAQs
What year of the Silverado and GMC Sierra truck is covered in the fuel pump CP4 lawsuit?
The affected 2011–16 Silverado 2500HD and 3500HD, and Sierra 2500HD and 3500HD were equipped with a 6.6L Duramax engine.
Why does the CP4 fail?
The CP4 is toast from lack of lubrication in U.S. diesel and metal to metal contact.
Can I put a CP3 pump on instead of the CP4 pump?
Yes, a lot of owners switch to CP4-to-CP3 conversion kits for good reason.
How Much Does It Cost To Replace A Bad Cp4 Pump?
Repairs can cost between $8,000 and $12,000 depending on how much damage there is.
How to become part of the CP4 fuel pump lawsuit?
Visit official case pages or contact a law firm representing the class action to register your claim.
