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Some 2024 Chevy Silverado HD, GMC Sierra HD Trucks Need Duramax Diesel Engine Replacement

Showing that General Motors currently does its best to fix even those problems affecting a statistically insignificant number of vehicles, GM has issued a customer satisfaction program encompassing both 2024 Chevy Silverado HD and 2024 GMC Sierra HD pickup trucks, which may be affected by a defective piston oil lubrication valve.

According to Customer Satisfaction Program N232427750, only 10 units of the 2024 Chevy Silverado HD and 2024 GMC Sierra HD are affected in total, with all 10 vehicles eligible for the available fix free of charge. In addition, some of these units are still in dealer possession and haven’t been delivered yet.

Side view of Chevy Silverado HD.

Affected Chevy Silverado and GMC Sierra trucks are equipped with  the 6.6L V8 L5P turbodiesel Duramax engine, which develops 470 horsepower and 975 pound-feet of torque. The condition results from the piston oil lubrication valve failing to open at the correct pressure. While GM does not list the exact problems resulting, piston oil valve failure often leads to too much oil pressure, oil galley plug blowout, loss of most engine oil, overheating, and seizing of the engine.

Dealers are instructed to replace the entire engine of affected pickup trucks, completely free of charge to the current owner of the vehicle. GM orders the dealers to carry out the replacement when an affected truck arrives in their inventory or is brought in for service; the replacement is not optional. The process requires 24 hours of total labor and dealers are instructed to provide courtesy vehicles to owners as needed for the duration of the repair.

Rear three quarters view of Chevy Silverado HD.

The customer satisfaction program will be available through June 30th, 2026. The General is providing dealerships with a list of the ten affected vehicles so that easy, quick identification can be made and a “prompt completion” of the fix carried out. GM is also mailing notification letters to pickup owners of record to advise them of the customer satisfaction program availability.

As a reminder, both the Chevy Silverado HD and the GMC Sierra HD are motivated by two powerplants, including the aforementioned L5P turbodiesel and the naturally aspirated 6.6L V8 L8T gasoline engine developing 401 horsepower and 464 pound-feet of torque. Both powertrains use the Allison-branded 10-speed automatic transmission for cog swaps as standard.

Front three quarters view of the 2024 GMC Sierra HD.

Both the Chevy and GMC models are underpinned by a more-capable variant of the GM T1 platform, while both trucks are produced at the GM Flint plant in Michigan and the Silverado HD is additionally produced at the GM Oshawa plant in Canada.

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Comments

  1. “Showing that General Motors currently does its best to fix even those problems affecting a statistically insignificant number of vehicles”…. ARE YOU KIDDING ME??? How many people have they left holding the bag on transmissions and lifters???

    Reply
    1. Cause the transmission problem was resolved, per a GM FSB. Take to a dealership and they’ll flush the fluid. If the issue isn’t still present, warranty the converter. If you had the issue on a second hand truck, you’re out of warranty. Take it to the dealership. Not a GM issue.

      Lifter issue was due to crap oil. I have a “lifter issue” truck. 208,000miles of hard work. No lifter issues. Take care of your vehicle.

      On all isssues with GM quality, that actually is a design/manufacturing issue, they have come through in the last 2 decades. Even the cobalt “key” issue turned out to be a bad call and a lawyer r@pe of a company with no bounds.

      Now, if you are still having 8 speed issues, you need a new stealership. They are screwing with you. A converter replacement is less than 1K. If they are charging you 8K for a transmission that only needs a converter, they are stealing from you.

      Reply
  2. WHAT?!?!?!?!?!?
    My neighbor had a 2022 GMC with the same engine and it spent most of the early days in the dealer for many ongoing problems and nearly all related to defective engine . While he was patient on the repairs (which took weeks in some cases) he finally gave up and traded it in on a gasoline 2023 and so far has had no problems.

    Reply
    1. Often these issues take some discovery time.

      Good example was the 2023’s having a faulty 6.2 block with bores that are slightly over sized. People complaining left and right about “lifter issues” and posted here on GMA last month, GM has discovered the issue and will now replace all engines free of charge. FYI, that’s why warranties exist. If that wasn’t the case warranties would be 1 week long. It sucks that your truck has to spend time at the dealership, but you’re not holding the bill for what you bought

      Reply
    2. The lifter problem ? You say resolved with a 2023 new truck? Ii have 22′ with 5.3 engine. No problems yet @ 9870 miles. What is best way to prevent problem ? I change oil every 3k miles.
      Mobile one extended milage oil and filter. Drive in L9 most of time to turn off AFM & DFM. WHAT ELSE TO DO ?

      Reply
      1. I solved mine by trading it in at about 35k miles when the dealer told me there was nothing wrong, and running like crap (missing while still in park) was perfectly normal.

        Reply
  3. Good! Now how about those 8-speed transmissions??

    Reply
    1. What about them? They are fine, they have the fixes out and the steps that need to be taken…

      Reply
  4. Guys I hate sound like a broken record. I was on here last week talking about the shotty work that General Motors is putting out engines roof sheet metal transmissions what is going on GM? Please wake up and go back to the quality work you were known for

    Reply
    1. I’m NOT a sexist BUT ever since they put that female as CEO of GM it has spiraled like toilet water trying to punch a duce down💩💩💩

      Reply
      1. When someone first says something like that, it is exactly what they mean; so good job on being sexist!

        Really, down the spiral? Which US auto manufacturer has been doing the best since coming out of 08? Which company has been turning out interiors and upping quality the last decade after being known for rental car interiors and rattle traps? Which company has developed technology to keep the V8 around longer? That failure rate some like to call out on lifters, is in the LOW single digit percent, it isn’t a mass problem. Those that have problems many of times are due to improper maintenance. Those that are were defects and caught and fixed by GM. As new vehicles get more complicated more issues are bound to happen, but GM I would say is doing better than the others when you look at the problems they are having. To each their own, sad though you have to resort to the sex of who is running the company as a problem. Funny thing is, 1000% guarantee they are doing a better job that you could ever do and are a better person all around as well…

        Reply
    2. Shotty work? Care to point out? They had an issue with valve springs, fixed. Recently found a problem with bore size, caught and being addressed. Transmission issues are few and far between. I am guessing the 8spd is what you are going to hang everything on, well guess what. That was addressed long ago and is no longer a problem. Many of times when it got bad it was a failure due to neglect in not getting it addressed in a timely manner and all started with the fluid. But go ahead and beat a dead horse. GM still makes some of the best drivetrains, that is pretty well known. Hanging on to a few instances that have been addresses due to manufacturing supplier issues or neglect doesn’t speak ill on the company.

      Reply
  5. I would say alert me when my new replacement truck has arrived. I don’t want a truck rebuilt by a local dealer service department

    Reply
    1. What about the LML with the bad CP4. A lot of these owner were left stranded with big repair bills. I couldn’t wait for, GM to make it right so I did a CP3 conversion. The ticking time bomb had me up at night. And my GM buying days are over.

      Reply
      1. I hope you didn’t buy a Ford or Ram as they still use the CP4

        Reply
  6. Look, EVERY manufacturer has issues. It’s funny that I’ve owned 5 new GM HD gasser trucks since 2007, logged over 350k on them , and have towed a very heavy job trailer without EVER losing an engine, trans, front or rear diff. I’ve NEVER had an “oil consumption” issue, I’ve never even lost a fuel or water pump. The only thing that I ever replaced out of my pocket, was a hydroboost on my ’15, that was after a warranty replacement power steering pump after I spun it up to 6,000 rpms when it was -20 F, the fluid was a little thick in those temps. I bought a genuine Delco unit off a GM Parts website for $200 & changed it in my driveway. Why am I so lucky??? BECAUSE I MAKE SURE FLUIDS ARE FULL & CHANGED REGULARLY! Most of the oil consumption issues are because the lube shops aren’t filling them or checking them after the filter fills, so people ASSUME they’re using oil when they check it and it’s 1/2- 3/4 qt low in a few hundred miles. Gotta be smarter than the vehicle & the grease monkey’s that re in charge of lubing them sometimes.

    Reply
    1. “It’s funny that I’ve owned 5 new GM HD gasser trucks since 2007, logged over 350k on them”

      That IS funny. You could have bought one Toyota instead.

      Reply
  7. I always said if GM treated people better there sales would increase exponentially.
    It’s about time too.
    They could have let this small number of trucks just slide.
    Good for you GM. Keep this customer satisfaction program going….

    Reply
  8. Why do you refer to General Motors as “GM”. They changed to gm quite a while ago.

    Reply
  9. To Steve, GM has absolutely not come through on all issues in the last two decades!! Where the heck did you get that from the GM handbook?! No company does and GM is most certainly no exception especially regarding that lifter issue and the transmissions. It’s not a matter of taking care of your vehicle because I’m sure most do. It’s a combination of imperfection, at time negligence, and cost to the company to recall the issue vs their projection as to likelihood whether the issue will surface before the end of the warranty when it then becomes your problem that they can then wash their hands of.

    Reply
    1. Totally agree with you on said issues.
      Poor engineering team is a major contributer. Parts constraints and parts quality will add further issues. When looking a new GMC SIERRA in 2022, I purposely stayed with the 22′ Limited 1500 series as they had 4 or more years to fix all issues with that technology level. I wanted the 10 speed and a V8 ice engine. The 5.3 is all I need but so concerned about lifter issues . I have to make this truck last a lifetime. At 78, I cannot buy another. Changing oil every 3k miles and using L9 on gear selector under 55 mph seems to be a temporary only preventive solution. If you know any other I would certainly appreciate info. It is a good ride and I plan to keep. I maintain to much per local dealer but is their opinion . They like selling NEW Trucks. Why the sudden price incentives on the 5.3 ? They know !!!

      Reply
  10. 100 percent Greg, my 2022 Colorado transmission is junk. 7 yrs that kept putting this crap transmission in a good truck. Extend the warranty on the 8spd p.o.s..

    Reply
  11. They must have a cheap supplier and a surplus of the 8 speeds to unload. I’d unload that or just give up and trade a good truck. The 5.3 and 6.2 engines are another example. Had a 2002 not any issues. 2014 was a nighmare. So far my 22′ Sierra w/ 5.3 and 10 speed has served me well. Just hoping is makes it through warranty. Im sure they hope so also. Then all those cheap cost saving parts and repair bills will be on me. My 2002 W/ 5.3 was old school.but lasted me 10 years and over 200k without issues with regular maintemance. Don’t know your warrenty situation but i would not spend my hard earned money on a poorly engineered problem. Good luck.

    Reply

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