GM Duramax Diesel CP4 Fuel Pump Lawsuit Certified In Seven States
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A lawsuit against GM has been certified as a class action for General Motors customers in seven U.S. states. The lawsuit affects customers who own Chevy Silverado and GMC Sierra pickup trucks equipped with the 6.6L V8 LML turbodiesel Duramax engine. According to the lawsuit, the Bosch CP4 fuel pump on these engines is defective.
Per a report from Car Complaints, the lawsuit alleges that 2011- through 2016-model-year Chevy Silverado and GMC Sierra pickups equipped with the 6.6L V8 LML turbodiesel Duramax engine are equipped with defective Bosch CP4 fuel pumps that are more fragile and prone to wear than previous CP3 fuel pumps. According to plaintiffs, the defective CP4 pumps can be destroyed by U.S. diesel fuel, which is allegedly “drier” than diesel fuel in other countries.
The lawsuit alleges that U.S. diesel fuel does not provide adequate lubrication for the CP4 fuel pump. The lack of lubrication can lead to internal fuel pump damage and result in metal shavings that damage the pump, the fuel system, and the GM Duramax engine as well. This damage can lead to the truck stalling and losing power, and may require the vehicle to be towed to a shop, leaving customers with big repair bills.
The lawsuit goes on to allege that GM was aware that the Duramax engines and related fuel pumps were defective prior to selling affected vehicles, but declined to notify customers. Rather, GM allegedly concealed that the defective CP4 pumps may be destroyed by U.S. diesel fuel.
Now, the new lawsuit has been certified as a class action for customers in California, Florida, Illinois, Iowa, New York, Pennsylvania, and Texas. The lawsuit was filed in the U.S. District Court for the Eastern District of Michigan (Southern Division), while plaintiffs are represented by The Miller Law Firm, P.C., Hagens Berman Sobol Shapiro LLP, and Hilliard Martinez Gonzalez LLP.
As GM Authority covered previously, GM’s motion to dismiss the lawsuit in California was rejected.
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2015 GMC 3500hd 34 000 miles well maintained.
Fuel pump ground itself up sending metal particles throughout the whole Fuel system destroying the engine. Metal particles were discovered throughout the whole system by GM service technicians. GM claims no responsibility for this. It cost close to $14,000 to repair. They did not use the same defective model Fuel pump in the repair. I really feel ripped off. I consider myself a loyal GM customer having owned 20+ GM vehicles. But I guess GM thinks ah screw him,
My 2013 GMC Duramax LML, At 85,000 miles the CP4 fuel injector pump completely imploded, while pulling my travel trailer from California to Phoenix and left me stranded in Kingman AZ. On Valentine’s Day, needless to say my wife was not too pleased. Had to get a tow truck for truck and trailer. Rent a U-Haul truck to pull the trailer rest of the way to Phoenix. One month later and thousands of dollars and a ton of inconveniences. ( The good people of B & B auto and diesel repair Kingman, AZ ) did a excellent job of cleaning up General Motors mess… Not too happy with General Motors right now… and I am cleaning up what I really think…
Waiting for some compensation, always had GM. IF NOTHING IS RESOLVED, I WILL BE SWITCHING BRANDS….
What is needed to get the remaining 43 states included in this Class Action suit? Honestly, I only care about where I live but realistically, we are all impacted by this issue.
My 2016 GMC 3500 Sierra Denali quit running at 72,000 miles while RVing in Grand Junction CO. GMC dealer quoted $16,000 to repair metal in the fuel lines and turbocharger. I’m back home in Phoenix…vacation ruined, towing fees, etc. Will cost close to $20,000 when done. I’ve reached out to the law firms leading the class action to see what can be done. Bought the truck in CA new.
So,? More info, am i supposed tp wait until it blows up? What can i do about it before, 2014 with 40,000moles thanx
I’ve done quite a lot of research on the internet about this issue and it is well documented that the BoschCP4 fuel pump fails and throws metal into the fuel lines. What I’ve learned is that the diesel fuel in the USA does not contain enough lubricants to operate the Bosch fuel pump properly and hence the failure. Most truck manufacturers have discontinued using the Bosch CP4 pump. Some of the articles contain suggestions for actions one can take to minimize the probability of failure such as adding additives to the fuel tank. So, my suggestion to you is to do a search for Bosch CP4 and read away. I’ll bet you will be surprised at the number of posts about the issue.
In a nutshell, most of the articles and you tubers suggest (i) upgrading the inlet meter valve (ex. Exergy Performance CP4.2 Inlet Metering) so that if the CP4 pump grenades it will stop the metal shavings from going further upstream, and (ii) adding a lift pump. There are also advertised conversion kits for swapping out the CP4 pump with a CP3 pump.
I am still weighing options- cash flow being what it is. For the time being I’ll continue to replace my fuel filter long before the DIC tells me too. And when practical, I don’t let my tank go below half, and I add lubricants to the fuel from time to time.
OK, gentlemen, in a nutshell, we already know, and some of us found out the hard way that these CP4 fuel injection pumps do not work so well here in North America because of the lack of lubricant in the diesel fuel. we shouldn’t be having to spend thousands of dollars for a workaround. Nissan and Dodge have already addressed the problem. Nissan stopped selling their diesel engine in North America because of the CP4 fuel injection pump
A president has all ready been set, so GM needs to reimburse all of us for the replacement or replacement cost plus costs occurred for the major inconvenience of this engineering failure! So in saying all this does anybody know the status of the class, action lawsuit, or the law firms involved? specifically in my case ( California.)
Come on GMC, you need to compensate your loyal customers, or forfeit future business. I’m a Floridian. And i sell, through word of mouth, many GMC products.
My 2015 Silverado 2500HD Duramax just failed and my vehicle has been down for six weeks while trying to get repair parts. Bill expected to exceed 15K
How do I get in on the class action lawsuits
Bill
William – I’m waiting to hear something too. Ours went down in January, finally back on the road again in April. 14K later is parts and labor. In Colorado –
Found this on a google search.
The states in which the class-action lawsuit has been certified are California, Florida, Illinois, Iowa, New York, Pennsylvania, and Texas. May 10, 2023
Haven’t been able to find anything for other states (outside of those 7) – not even sure where to turn at this point!
My CP4 failure on my 2011 Chevy 2500HD LML in 2020 @ 99,937 miles cost me approx $9K to replace woth a CP3 conversion and lift pump. General Motors owes me that amount, but the results of a class action suit will be to offer owners $1K off the MSRP on a new Chevy or some crap like that. They did that for the 1985 Chevy K10 truck I owned that would catch fire in a side impact, burning the driver alive. Some deal that was!