I have a 2011 GMC Savana LT 3500 Passenger Van with the LGH 6.6 Duramax. Yes, adding a lift pump & running a fuel additive are both highly recommended. Hi Marv – while we can’t tell you a date when GM started using the CP4.2, the part number from the pump would end in “817” for the up-to-date version. While I am not totally immersed in the diesel pickup arena, I have one and have friends who have them. Hi Gene- The CP4 pump is located in the valley of the engine. Does the cp4 pump come in the 17 also? Called dealership and they asked, “Is it still running?”….leading to conversation about the above issue….I’m like….you know about this…and…? Please send me copy of bulletin as well. I have 6.6 Duramax in a GMC 3500 HD from 2009. I’ll email you a copy of the post – please let us know if you are in need of any replacement parts! Hello Mike, Thanks for stopping by, well send that over to you right now. The best way to confirm you have a pump failure is by investigating the fuel system for metal debris. Please let us know if you have any other questions. If your truck has the original CP4 you might consider upgrading to the updated CP4.2 as a precaution to avoid the catastrophic failure. We are really sorry to hear you are having to deal with this difficult situation yet again. Could I also get that bull item? only have about 30,000 miles on it. Hi John- Yes, the design of the updated CP4 pump has been changed to reduce the risk of failure. We have the lifetime drivetrain warranty. We will be carrying their CP3 conversion kit soon & also have the CP4.2 pumps available for $599.99 here: https://www.injectorsdirect.com/product/duramax-lml-lgh-cp4-injector-pump/, In the meantime you can tell which pump you have by locating the part number label, the original Bosch P/N is 0 445 010 616, the latest updated Bosch P/N is 0 445 010 817. Please feel free to give us a call to discuss your truck – 800-500-0980. I am reading lots about the pending “implosion”. Can you please send me a copy of the bulletin. thanks so much. bulletin. Please give us a call at 1-800-500-0980 and we would be happy to answer any other questions you have or assist you in placing an order. Can you send me the technical bulletin? Many customers have requested a copy of our article be sent to their email, which we have done. 5 Most Common Chevy 6.0 Engine Problems. We will send you a copy your way. I bought it from the dealership and bought the extended warranty with the truck lifted. I just emailed you a copy of the article, please let us know if we can help you with the parts to get your truck back on the road. The CP4.2 available in the 2019 RAM is understood to have design updates to reduce the likelihood of failure. Had no idea this was a problem. Thanks, Only has 55000 miles on it. Thanks for stopping by! Will a free flowing diesel exhaust cause a loss in torque or power? Please let us know if you need any further assistance! Bet this is the problem. I’ll send that over for you now, Dennis. While it is true that Biodiesel inherently has more lubricity then regular Low-sulfur Diesel, making it an added benefit to your fuel system, we have not seen any biased for where the pump failure has occurred. Thanks much. Could you please send me the info also I have a 2016 Duramax with 40k. Dealer says the fuel system came apart. Hello I have a 2018 GMC 3500 Sierra fuel pump has to be replaced been having reduced power for at least 9 months had all injectors replaced an fuel rail system an still problems going back an fourth with GM so please send me a copy of the test bulletin an any other helpful info. The latest part to fail was the reductant tank heater (DEF Heater). Could not get it to start after that so it was towed to the dealer.

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