GM Experiencing An Increasing Amount Of V8 Engine Valve Lifter Issues
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GM Authority has received a growing number of emails and messages from General Motors pickup truck and SUV owners experiencing valve lifter problems.
Some of these owners are stating that their vehicle has been at the dealership for several weeks while waiting on repairs. The valve lifter issues seem to concern the naturally aspirated 5.3L V8 L84 gasoline engine and the naturally aspirated 6.2L V8 L87 gasoline engines, which can be found in 2019-and-later model year Chevy Silverado 1500 and GMC Sierra 1500 pickups, as well as 2021-model-year full-size GM SUVs, including the Cadillac Escalade, Chevy Suburban, Chevy Tahoe, and GMC Yukon.
To note, the naturally aspirated 5.3L V8 L84 is rated at 355 horsepower at 5,600 rpm and 383 pound-feet of torque at 4,100 rpm, while the naturally aspirated 6.2 V8 L87 gasoline engine is rated at 420 horsepower at 5,600 rpm and 460 pound-feet of torque at 4,100 rpm.
Repairs for the V8 engine valve lifter issues are currently being performed under warranty.
The uptick in complaints from GM Authority readers regarding valve lifter issues follows a service bulletin issued in September of 2020 addressing valve spring issues in newer 6.2L V8 engines, including the L87, LT1, LT2, and LT4. The service bulletin states that certain GM V8 engines may produce a service engine light, along with a misfire and peculiar engine noise, which is the result of faulty valve springs. The bulletin instructs technicians to check for a broken valve spring and, if necessary, perform a cylinder leakage test. For other GM V8 engines, including the L82, L84, and L8T, technicians are instructed to replace the affected valve spring, and if there is a cylinder leak, perform further inspection to determine the extent of the engine damage.
A report from GM TechLink also indicates that GM pickups and SUVs equipped with either the L84 or L87 could experience a “misfire condition with a bent pushrod that leads to a collapsed lifter or the lifter comes apart.”
GM Authority will follow this story closely and report back any further updates as we receive them.
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I have a friend who is tech at a big GM dealership and he told me about this last week. He state it is a supplier issue and they were told GM is working with the supplier and trying to figure out when the parts were made so they get them fixed asap on more vehicles. He said the lifters/springs are cracking from a manufacturing defect if there is no damage to engine he said they replace all of the springs/lifters on the side that is has the problem. Anything being built now should be fine.
Do you know who the supplier is and manufacturer location?
I believe it’s the former Delphi Technologies in Mexico, now part of BorgWarner.
Thanks for the info Sam. I really wonder if GM and the other manufactures are really better off outsourcing this stuff to 3rd world countries. At least its not China.
Stuffs been made in Mexico decades and from what I experienced it’s extremely well made the country is third largest auto exporter in the world. My 01 Silverado from factory with 350 thousand miles has made in Mexico parts that have yet to be replaced.
What about the transmissions the 6 speeds go out around 120,000 I know personally 6 friends including me that had to replace transmissions the years 2014 to 2016
I find it hard to believe that this is simply a part defect due to material or poor supplier quality control that was recently discovered in a limited production series and all is well now. This problem has been reported in large numbers on engines manufactured in 2019 all the way to 2022. GM is just now discovering this as a supplier issue? And now everything is fine? I think a certain number of pushrod issues in certain manufacturing lots were caused by faulty parts but the vast majority of the lifter failures were outside of this limited batch. And the fact that no one in GM is openly addressing this issue speaks volumes. I guarantee you that we will continue to see engine failures in very recently manufactured and sold trucks and SUV’s. Stay tuned.
Mine is a 2014 Silverado with the ecotec 5.3L V8. Last summer I had to have all the lifter replaced due to one collapsed lifter and two weeks ago it bent a valve on the opposite bank from the lifter issue last year. 152,000 miles on the truck.
I have a 2021 GMC 5.3L with 15k. Just got it back with one side having all lifters replaced. Hope the other side doesn’t go bad. I cannot understand why they would not do both sides when the engine is already torn down.
My 2021 GMC AT4 with the 6.2 failed completely on one side. The dealership was instructed to repair only the faulty side, as indicated by the service writer. I strongly objected and made note of it in the transaction and in the review. That was at about 11,000 miles. I am now at 28K and starting to hear noises just like the ones at the first failure. Took it to the dealer who indicated they did not have a technician available to inspect and recommend for a couple of weeks. He assigned me an appointment for June 2. I am inclined not to accept a repair of just the failed side this time, only to see another failure due to floating debris. This is not acceptable. There are rumors on several sites stating that GM is offering 6 year/100,000 mile extended warranties for vehicles affected by this debacle. Anyone know if this is accurate? Anyone a part of a class action? What are you hearing.
Following, I have a 2021 at4 GMC and had the same problem, would only change one side. Happened at 15k miles. Would love to see a class action where the very least GM would supply a 100k mile warranty…
Yes I got my local dealer to do both sides when one failed on my 2021 Denali with only 8039 miles back in January and then followed up on the CCL ( component coverage letter) extending engine warranty 100k miles and 6 years.
I have a 2021 AT4 5.3L . At 23k it had 2 bad lifters and a bent push rod. that is all they replaced. Now at 25k it is in the shop again with more bad lifters. I repeatedly asked why not replace them all. Was told it is GM’s policy to only replace the bad parts.
Concur,, 2018 6.2 Denali higher mileage well cared for and all synthetic oil etc Now awaiting manifold, and lifters as loud click and apparently bent push rod
I’ve got a L9H 6.2 2010 SLT and I recently took it to the dealer for brakes and they pulled the “cash Grab” vehicle inspection with “Numerous” problems. Some Tricky Tacky except for the price. I wanter the Rear Rotors replaced and Pads, $520, but the cash grab part was they only quoted me Parts Prices and never offered a Labor or Book Time price. I said No Thanks. You would think Dealers would “attempt” to be Ethical after Decades of this Shifty, Shafty kind of business practice to build customer word of mouth referral.
How long did you have to wait on parts? Any more issues after it was fixed (assuming it was fixed)? I’m currently waiting on same parts with no ETA…..
I just purchased a 22 GMC AT4 My truck was just put into the shop with lifter failure at 3000 miles with no check engine light that never came on. I was the one that Notice the ticking from the motor . The dealer would not accept That it was a Lifter issue until they diagnose vehicle and it came back as a bank 2 lifter failure. They only want to replace the one lifter how can I go about getting all lifters replaced on both banks
On mine, they replaced the one bank of lifters, with 3k they should replace both. I am now getting a check engine light again with 18k. What trash! Mine is a 2021
Robert.
This makes even more nervous. I have a 2020 silverado with a new engine at 10k. I was going to buy a new one because I figured that the problem was taken care of. Now I’m thinking of switching to the Ram. I’m really a chevy fan, but GM is making this difficult for me. I wish all of us the best. GM needs to do the right thing and take car of their customers.
Sincerely a customer with a new engine with only 6k on it.
Well Ram has had their fair share of lifter/camshaft issues too. But I don’t think to the same degree has GM V8s have had. I think the source of their troubles the same in using variable displacement technologies which play hell with the lifters. Amazing that the Big 3 all used to make V8 engines using flat tappet cams that would run for years without issues.
What is the build date on your VIN sticker and did your truck have the chip for DFM? Thanks
Agreed, i bought a used GMC Sierra 1500 5.3L with 105,000 miles within a week of the purchase I had to get the transmission replaced with a reman. Then front upper ball joint, not been waiting on a motor I ordered from O’Reilly’s for almost 4 months…. (already paid in full when order was placed) because of a failed or collapsed Lifter on Cylinder 6. It’s still drives but it’s getting really bad and just blowing smoke that Cylinder 6 won’t burn.
Careful, if 6 is missing firing and lifter is bad, its possible for it to get worse, bend the push rod and and wipe out the cam.
Yeah kind of waiting on that to happen. They should still be fine with the core refund though I’m supposed to get back from the block regardless. Sure was hoping to get this motor first. Ordered the exact same motor, bought the OBD2 delete kit, then about a month ago finally got a call from O’Reilly’s Stadium they found somebody that finally has an engine they’re about to get started on it but it’s going to cost another $2,100. This is not including the $4,995 I paid when I made the order. Then Wednesday I get a call apparently everybody is waiting on cam bearings so they’re at a stop.
Yes suppose to.be ordered or produced in Indonesia
I have 3000 miles on my Z71 and it’s starting to develop a tick sound from the engine
gm should have to buy back every single pos they sold with bad lifters
Same here but at 5k on my z31. No misfires but a significant tick on front driver side 5.3
The problem I had with my 5.3 L V8 was bad lifters. My dealer rebuilt one bank of cylinders after the compression issues and ticking started. After doing some research, it appears the issue is the DFM causing cylinders to shutdown and lose oil pressure. When you hit the gas, the DFM activates the cylinders, and now there’s no oil, so the lifters or rods bends and eventually break. The tech said it happens much more often than it should.
The simple fix is to get a Range Disabler. It plugs into your port and disabled the AFM/DFM so your engine runs on all 8 cylinders all the time. There’s a slight decrease in gas mileage, but your engine will never have that issue again. It does not flash the system, so it won’t void your warranty. The only thing you need to do is unplug it when you bring it in for any kind of service. For $200, it’s worth every penny.
I have seen some recent posts about the lifter/push rod failure issues by owners with only 3K -8K miles or so in both the 5.3L and the 6.3L engines. So this indicates that the problem is a design issue and not limited to a batch of bad parts/supplier issue that plagued a certain models (and covered under a service bulletin a year or so ago) and continues in the 2022 models as well and will be the case in the 2023 models. Is my thinking correct or was this indeed limited to 2019-2021 engines? Anyone having this issue with 2022 model 5.3L and 6.2L engines?
KSM, the service bulletin that told dealers to change the lifters before the customer bought them was for trucks built 9/2020 to 3/2021. I thought I was safe with a build date of 8/2021, 5 months later. I read all comments on this article and the service bulletin article telling dealers to fix the engines before selling the trucks. One person had lifter failure with a 7/2021 build date and another person with 9/2021 build date. I’m right in the middle. The biggest indicator my truck will have problems is another person had lifter failure on their 2022 model year. I replied to them asking their build date, but didn’t hear back. So yeah, someone is having a problem with 2022 model year.
Thanks. Thats too bad – I think I will skip the Tahoe for my next SUV. I was hoping that they would somehow fit the new diesel engine (higher torque and HP) in the 2023 Z71 but thats not to be. I will shop other brands. Good luck.
KSM, you’re welcome. Yeah it’s crazy GM can’t get this right already. Several comments come from people saying they had lifter failure due to DOD parts in trucks from 10 years ago or however long ago DOD started. It’s been a decade or so long problem. You could still get that Tahoe and do what I’m doing, a DOD delete. It requires the rad, intake and heads to be removed to replace the DOD parts. A crazy amount of work considering it’s a new engine, but afterward, it will be a 250,000 mile engine. The DOD cam has to be replaced too, so you can put a performance cam in if you want. I’m doing other upgrades like getting rid of the needle bearing trunnions too. Check out DOD kits from Texas Speed and look on youtube. There are lots of people doing this, most after failure. If you stay with GM, the HD 6.6 8LT doesn’t have DOD/DFM, but you can’t get it in a SUV. Neither does the 4.3 LV1, but it’s a V6 and was only offered in the vans. The 4.3 LV3 is also a V6, (used in trucks) but it DOES have DOD, so stay away from that. The 4.3 was dropped from the truck line for 2022 anyway and not sure if it was ever offered in SUVs. I hope this gives you some more ideas!
Thanks again Dan for the detailed info. You are right – THIS IS NUTS to buy a $70K SUV and then have to do major open heart surgery on it. I have been away from GM products for well over 30 years but was seriously considering GM and had placed an order before this issue came to light. This coupled with everyday GM cancelling this option, then that option on my order, I decided that the GM solution was not for me. I know every maker has had and will have issues, but this is just plain un acceptable right out of the gate.
I have a 2022 Yukon SLT, 5.3L. Bought it 12/26/21. Just brought into shop with bad lifter on cylinder #8. 7321 miles. Dealer says they are changing both sides. i feel this truck is tainted and thinking about trading it in. But from what I am reading this same issue may still be present with the 2023’s. Ughhhh!!
I feel your pain and hope that once fixed this issue becomes a distant memory – but at least you are getting both sides fixed. Many are not, leaving a possible ticking time bomb so to speak. I was in the market for the 6.2L (towing needs) and still cant get anyone (including folks who work in the service dept.) to tell me what if anything GM has done to solve this issue (other than fix em when they fail). So I have placed an order for the Duramax 3.0L Diesel. I know fuel prices right now are sky high (especially Diesel even compared to premium gas) but based on my average number of miles per year it is still the better alternative and I feel more confident in that powertrain – I least I know exactly what GM did to fix the long/no crank issue with the diesel but have no idea if anything has changed on the lifter/pushrod issue with 5.3 & 6.2L. With so few miles on yours, it maybe a good time to make that trade.
Thanks for the feedback. The dealership called yesterday evening(Wed) and said my truck was already done which shocked and also made me feel better. I was just there Monday morning grabbing some stuff out of the truck(2 days ago) and the service manager said they were waitiing on parts the truck wouldn’t be done until later next week. I don’t know much about cars and lifters…etc but can this be fixed that fast?
I also just received a call from GM in regards to lemoning my truck and they said someone from the California division will be contacting me. At least I feel GM is being attentive to this situation.
Hi Benson
GM replaced the motor in my 2020 Silverado 6.2 at 10k. The new engine now has almost 10k on it and so far everything is working great. The one thing I did differently is always drive in sport mode. I’m not sure if this is the answer but so far so good.
Good luck my GM friend
GM replaced the motor in my 2020 Silverado 6.2 at 10k. The new engine now has almost 10k on it and so far everything is working great. The one thing I did differently is always drive in sport mode. I’m not sure if this is the answer but so far so good.
Good luck my GM friend
Thanks for the feedback. The dealership called yesterday evening(Wed) and said my truck was already done which shocked and also made me feel better. I was just there Monday morning grabbing some stuff out of the truck(2 days ago) and the service manager said they were waitiing on parts the truck wouldn’t be done until later next week. I don’t know much about cars and lifters…etc but can this be fixed that fast?
I also just received a call from GM in regards to lemoning my truck and they said someone from the California division will be contacting me. At least I feel GM is being attentive to this situation.
Yes. I bought a 2022 gmc sierra. 5.3 v8. It had 7 k miles used. I had it for two days and the lifter went out and event push rod. Got it back and drove it for 3k more miles. And another lifter went out. It currently sits at 11k miles and 2 failed lifters and bent rods.
Ace, what is the build date on the door jamb sticker?
There is way too much sales hype concerning a Range Disabler.
Defective lifter springs and defective lifter spring clip pins are the root causes of this problem.
I may sound arrogant but I refuse to purchase an aftermarket to circumvent what is clearly GM’s responsibility to begin with.
I have read 100’s of posts on this forum and some of them are really heartbreaking, and I’m sure many of them are truthful and valid. But some also are invalid because of just plain warranty oversights or omission of facts or circumstances.
I bought a 2021 Silverado new with the 5.3L now with 5800 mi. and I can hardly sleep at night for wondering when the engine is going out.
But, when it does happen, I will deal with it legally and get the repairs made to my satisfaction or be the squeaky wheel til it is.
Unfortunately, GM is one of those “too big to fail” entities and since the recovery from Covid supply chain shortages and resulting inflation, GM is making huge windfall profits. They will work through this issue based on statistical data and financial impact priority until warranty claims are virtually nonexistent.
That being said, all of us that think or know we have valid complaints should do just that. COMPLAIN !
First have a written list of what you expect for satisfaction.
1. Complain to the dealerships.
2. File with the class action suit.
3. Call the GM Customer Service number frequently.
4. If you do not receive satisfaction, Talk With an Atty. to learn what your options are.
I have a 2018 Silverado LT Z71. At 60K miles I got a flashing check engine light and a traction control symbol on the dash. The engine seemed to go into limp mode and was running very ruff. When I slowed down, it would down shift very hard.
Put an analyzer on it and it stated I had misfire on # 7 cylinder. The dealer replaced the lifters on both sides and installed a new manifold that I had to wait a month for. Everything seemed to be working well afterwards and I had no problem thinking that it wouldn’t happen again for another 60K miles. Two weeks later, the very same thing happened again. I did hear lifter noise just before it happened also. I told the dealer that I checked this problem out on line and there are thousands of owners with the exact same problem. When I told them the 5.3 was a piece of crap, they 100% agreed with me. They stated that the parts that they are receiving are not any better than the parts they are removing. This will be a NEVER ending problem and needs to go into a class action court case. I tried to trade my Silverado for a Toyota after the first break down but could not get a fair offer from anyone. Other than the engine, I loved the truck and will immediately trade it off after I get it back again.
Robert, I sincerely sympathize with you and I wish I had the means to help you and all the jilted GM owners who have suffered the same problem. Unfortunately, it seems to me that GM , the legal system and our government have a close relationship that Does not see a problem as long as GM Continues to make repairs to the vehicles until the warranty expires. I see so much venting of frustrations on this forum That I have to wonder if this forum works in favor of GM also. JMHO.
John, sounds great, that was my plan too. The problem will still happen though based on my reading of over 600 comments, including the 445 on this article. My 2021 5.3 had 5 miles when I took the engine out. I won’t let GM touch it, free or not $. They will just put in more bad lifters and it will fail again. Do a DOD delete kit from a good company like Texas Speed and while you’re at it you can put a performance cam in. You have to change the cam anyway. You’ll have no oil psi if you leave the DOD cam in.
Dan,
Mine happened at 5,300 miles. I got the Disabler right after I picked up the vehicle from the dealer from the service. In theory, it should work since oil flow seems to be the main issue. Truthfully, I didn’t wait around to find out for long. I traded the Sierra in about a month later for more than sticker and got a 2021 Acadia instead. 27K later, and no regrets.
John, that was smart to disable right away and smart to get rid of it and wow, more than sticker, nice. That’s what the used car market was like for a bit. My truck didn’t even have the semiconductor chip to allow DFM to work, I thought I wouldn’t even have to disable it, thought I was totally in the clear. After reading several comments about it still failing with it disabled, I realized I could still have problems because I knew that even if the trucks didn’t have the chips… they still had the same engine internals.
Referring to Mexico in this context as 3rd world country is borderline racist and seriously insulting. They are just like USA a developing country. No I am not Mexican
On the outsourcing in cheaper labour, it is a direct result of capitalism. Are we ready to pay more and have our companies make less profit? If not….can t complain….
Most of my Mexico built trucks have been better than my US build ones. And that holds true for GM and Ram.
Your sensitivity makes me vomit, Mexico is a third world country for many reasons, it’s a fact.
Large companies love having their products made by people that will work for $5.00 an hour, but still make us pay top dollar when they sell their items here, in the states, pocketing huge profits.
Residents of third world countries settle for peanuts because they are accustomed to having nothing.
Because that’s how people live in a Third world countries.
So is Detroit a 3rd world country.
I have an 07′ Gmc Sierra WT. 323k miles. Did have lifter problems at 177k. Good run? Opted for new crate engine. Haven’t had any issues with engine. Will need truck in future. Don’t want lifter issues or any other issues associated with any new truck. I suppose they all have some kind of issue. Just remember this folks. The consumer is always in control of one’s wallet! As much as I have enjoyed my Sierra, I only have one thing to say to GM. Get it together before you are just a memory.
My 2019 sierra Denali lifters just went out at 64,000 miles they are refusing to pay $5000 out of my pocket I’m going for an F2 50 super duty!
FAIR SPEECH MORON WOKE , PULL YOUR HEAD OUT AND GET SOME AIR ………
Sorry but even though Mexico is developing country it is still considered 3rd world and probably will always be as long as the drug cartels continue to run it, race has nothing to do with it, as far as the USA is concerned, it has a modern fully developed economy.
racist??? really?? mexico is, was and will always be a THIRD WORLD COUNTRY… you are whats wrong with this world, reach down, pull and pull your panties out of your ass and get on with your life Karen….
They are not like the USA and if it was so great there than why are they all trying to come here you’re right it’s great there return to your home country! And if I buy a Chevy which I own I want it to be be made in the USA I’d rather pay a little bit more than have some Third World country making parts for my American Truck !
Hello from my experience I would rather have a truck made in Mexico than a pos chevy. They don’t last 5000 miles. My 2020 chevy left us broke down. Toyota will run forever
Tell me you voted for Joe Biden without telling me you voted for Joe Biden
Mexico is a third-world country and I’ve heard this all 65 years of my life. Before you go into cheap labor look at all the slave labor stuff you by from China and how sorry Biden wants to drop all tax tariffs to reward them for infecting the world with a virus by silence. Get off you racist everything cry baby lazy @ss Mr. or Ms. Fair Speech. You are entitled to your view but a whole lot more people are entitled to their despite our riots and destruction and stalking supreme court judges. The democratic socialist party is evil in so many ways and racism is their big excuse along with Putin-made gas and inflation. Were not idiot, but you might re-evaluate your name-calling self. You are the racist.
I was posting but have been following since. I have a 6.2 2021 Silverado. Lifters went at 7700 miles. Y’all need to know, your dealer controls most of this replacement and warranty whether they tell you that or not. My dealer got both sides replaced for me and gm covered it. As for the CCL warranty I went to gm first as my dealer instructed me too. Long story short gm came back and said dealer needed to fill out request. Went back to the dealer. The shop manager went to gm. Next day I get a call from gm customer service saying they won’t give it to me. Following day I get an email with the dealer CC in saying I got it. All because the dealer went to them. Don’t take no for an answer on either. Fight like hell and you’ll get both. The Dealer influences this regardless of what they say. They always start with lip service. Y’all know that.
Good for you. Squeaky Wheel gets the Grease! Take care. I’ve got a 2010 6.2ltr but it’s an L9H old school. Never had any Lifter, Cam, related problems. I was thinking about a new one but all these prob lets and no trucks on our lots I’;ve changed my mind. Hang In. Sounds like you’ve got a descent service mgr.
Jim.
A similar thing happened with my 2020 chevy 6.2. GM said they would only replace one side. To make along story short. GM agree to replace both sides then to finally realize engine replacement was needed with only 10k. I let GM know that I was disappointed. GM offered to a payment as long as my payments were current. My truck runs great with new 6.2. However they never made a payment even though they offered. The dealership had my truck for 3 months.
Still disappointed with GM
Of course it’s from Mexico.
What did Scotty Kilmer say about Mexico quality?
Most of what Scotty Kilmer says is total BS!
Scotty Kilmer is a real Jamoke.
Only to the Ignorant, stubborn, fan boy cultist, or mentally fragile.
The truth hurts your fragile American ego.
Now enjoy having your wallet bleed in agony.
Actually what Scotty Kilmer says is the cold hard facts.
Just mentally fragile fanboys like you can’t handle hearing it.
Enjoy having your wallet bleed in agony. Maybe with enough pain you can join the ranks of the homeless & financially ruined. Stubborn stupidity has a price.
I have a 2021 Tahoe that’s been in the shop twice this year for failed lifters. 6,000 miles two lifters failed. Out of service 3 weeks. Only replaced the two failed lifters, wanted all replaced, Chevy would not do. Tahoe is back in shop now, two more lifters failed other side of engine, they only want to repair that side of engine and don’t want to replace the other lifters on opposite side of engine. I am arguing there are still two cylinders on the original repaired side of engine that have the faulty design and they all need to be replaced. It is like dealing with a bunch of children, all I want is a dependable vehicle, this is the most undependable vehicle and the worst customer service I have ever had. Looking at Toyota now, I really want to continue to buy American but I’m tired of this.
I have stayed away from GM products for 3 decades. Never regretted my decision. I must have had a brain twitch because I placed an order for a 2022 Z71 6.2L. Every few weeks its been one thing or another with feature/option availability. This week my salesman told me that GM is now going to pull the plug on the power sliding console. I was really getting cold feet reading all these issues and seeing consumer reports owner survey result rating of 1 out of 5 for these product reliability. I used this latest option availability issue to cancel my order and start my deposit refund process. Why would anyone spend over $70K for products that are so questionable? I very happily stayed away for 30 years and will continue to stay NO to GM.
My 2021 Silverado is in the dealership now with broken lifter and bent push rod, Week and a half. It has 8990 miles on it, this is a first in all the Slverado’s I’ve owned.
My understanding is GM is working with there supplier to try and figure out when the faulty lifters were produced.
This is a reason I lease a new one every three years, it’s under warranty. I’m not happy but what ya gonna do? If it happens again I’ll be changing to another manufacturer.
The dealer furnished me a a loaner truck, but it reeks of cigarette smell, I’ve ionized it 3 times, a little better.
My 2013 well maintained 5.3 just blew up at 102k and engine replacement was 8k dollars. Mechanic said this is to small of an engine for heavy trucks. Went to Hemi even with there 2% of lifter cam failure at 100k. Everything they make out of the US is junk
My 2020 Silverado Trail Boss just failed at 18k due to the lifters. It’s the 5.3 engine. I can’t wait to get it back though because it is an awesome truck and all things that are massed produced have some issues. I will always go Chevrolet !!
On October 18th GM issued their Component Coverage Letter valid for my 2021 5.3L Trail Boss which recently experienced a collapsed lifter and was repaired by my local Maine Chevy dealer. This letter covers a long list of engine components including all lubricated parts, block, heads, manifolds, mounts, etc. as well as modules, injection and water pumps, throttle body and the pressurized fuel system. It’s a six year / 100K miles extended warranty from my recent date of repair. This Component Letter is transferrable to any subsequent owner.
If you have experienced this lifter collapse problem you should go back to your GM dealer and request the CCL. You may have to fight like hell, but it’s worth it. I hope your GM dealer will go to bat for you the way mine has done for me.
General Motors knew about this all along and now we’re are a static we purchased a 2021 GMC AT4 and 6 months later we had to take it to the shop and load and behold it was the lifters? We were told they had no parts the $70,000 truck is outside for a month now. Had not heard anything from dealership my husband went to check on truck at dealership was informed that they received parts. Let’s see how much longer and how long it’s going to work without breaking down again? Is this the time to look into the Limon law? Trade the truck?
Thats fine if you drive your truck less than 100K miles. If you drive them longer, then good luck to you.. I have been driving Toyota’s with zero issues for well over 200K miles each. Sleep well!
I think it’s bad that you pay that much for a vehicle and before the first oil change that the dealer has to go in the motor for repair.
2021 Cadillac Escalade the worst Cadillac ever made in my suv They replaced second engine
Guys whatever you do do not get this car because lemon law it will start after the fifth time problem now my third times they going to replace the engine again
My 2021 Escalade is in the shop for the 2nd time with lifter issues. I’m ready to get rid of it.
Should of bought a Lexus or Mercedes.
I have a 2021 Tahoe High Country that I brought in November 2020. It’s in the shop within the valve spring issue. 8323 miles on it.
21 gmc sierra 1500 at4, I had lifter failure at 1890 miles in February, this was when they only replaced the bank on side of the failure. Literally today 14,410 miles I heard a pop and a bang… Drove straight to the dealer… Same bank that was “fixed” failed.
Joe,
Is Chevy offering any money back due to the lifter issue? I know I was without my truck for a few weeks and they only replaced one side not both and it stated they should under 8,000 k miles.
Now I am having a paint issue with brown spots appearing on my White truck and it’s under the clear coat. Maybe break grease they used I am not sure and they can’t seem to determine. This is going to take around 3 weeks to repair since they are backed up. I wish they would just buy it back and I could get a new one.
When I inquired on this all I was given was an extension on my drive train warranty which in the end won’t help because I lease. The truck will be going back at the end of the lease and I will be done with Chevy’s.
My 2021 just went in for lifters and they were telling me they would only change 1 bank. The new motors have tighter clearences and are balanced motors. That’s how they get such high horsepower out of the new motors. When you replace 1 bank and not the other it isn’t a matter of if, but when the other bank is going to fail if not grenade the motor.
2021 Tahoe started noticing a issue at 600ish miles…. took it to the shop yesterday 1300 miles and bad lifters. I’ve only had it 3 weeks
I wasn’t aware of this issue till after my sons truck went into a garage to be fixed & now is costing me money to be done! Is GM going to reimburse people that can’t wait for a recall to have this fixed?
I have a 2014 that has the same motor and it sounds like the same problem I’m having
Unfortunately it’s the exact same problem and it goes back further than that.
Goes back to about 2002 and it’s effecting quite a few cars and trucks.
They excluded 6.0 in pontiacs
Prior to paying over $5k to get my 2017 Yukon XL engine repaired I specifically brought up this issue and asked if it were a parts thing, and they told me NO, its a manufacturing defect. And their resolution is to provide extended warranties. The new parts are subject tot he same problems….WTF?? So i sold my 2021 Tahie that i had just bought for roughly the same thing i bought it for 20,000 miles ago, and then once the enigne was repaired, i traded it in for a Ford Expedition Stealth edition which drives like a cloud. Got good money for the Yukon and am happily just sitting back and watching these emails roll in, forwarding a few to the attorneys that i hope will finally bring a solid class action lawsuit against GM on this.
Our 2021 RST that we’ve had for 11 months and had 10,000 miles developed an annoying tick last week. It’s currently in the shop. Bad lifter and bent pushrod. I’m just sick about it. I love my truck. They have no idea when the parts will be in. They say their on back order. At least GM is paying for our rental I guess. We have a 2002 Silverado we bought new that’s never gave us an issue besides a fuel pump. Still runs strong
Clearly this is not correct as we are seeing 2022 engines with around 3-4K miles having same exact lifter and pushrod issues. So no – nothing has improved and the root cause remains. GM continues to pump out junk and a 100K extended warranty or service plan is of little comfort if you plan on driving your $50-$80K vehicle more than 100,000 miles.
I am getting my truck out today for misfire on cylinder #8 and collapsed lifter. 2022 Yukon SLT 5.2, 7321 miles Dealer said they are replacing both banks. They finished the job in less than 2 days. I read in these posts about a tic, tic noise which I don’t think I heard in my truck. Wil the noise they are reffering to be coming from the front engine compartment when I am sitting in the drivers seat?
What I did hear is a clock/clock noise towards the middle/bottom and just to the right of the drivers seat. More like underneath the truck than under the hood. Almost sounds like a gear trying to engage.
On another note, I also hear a noise like a gear moving around just behind the gas pedal/firewall when the truck is off and I am sitting in the drivers seat. It make this noise for about 5 to 10 seconds. Is this a normal noise?
When it happened to mine, it was more like two cylinders were missing. Running Rough. They only did one side on mine so you are lucky you are doing both.
Your friend as a TECH, is being told this because he is in a NOT TO KNOW POSITION. He doesn’t have a clue.
I had engine replacement on my 2020 Silverado 6.2 at 10k. A friend of mine with a Corvette 2017 said to me he always drive with it in sport mode. He believes that these motors should be driven harder. So, the new engine in my 6.2 I decided to drive in sport mode. I’m not sure but 8k in on the new motor it seems to run better than new.
Time will tell My Chevy Friends.
Hopefully they get a handle on this ASAP, this could turn into a real PR problem if not addressed properly!
It already has. My chevrolet truck had lifter issues at 50k. My father-in-laws truck had lifter issues at the same time at the same mileage of 50k. Both trucks were bought the same year. I doubted buying chevy again this time after they took bailout money and seriously thought about buying ford. These lifter issues have all but made that decision for me.
I went to RAM after a series of issues with my GM trucks and I have never looked back 4.5 years in on my 2017 Ram with zero issues.
My chevrolet truck experienced lifter issues at 9200 miles. It is currently in the shop. Definitely WILL not buy another GM product after this experience!
My 2021 GMC Sierra is in the shop right now for the valve/ lifter issue. Just a little over 6000 miles on the 5.3 L My question is , how reliable are the replacement parts ? Am I going to have this same problem down the road and out of warranty ?
More crap from lowercase gm, what a joke!
Seems that the General just got a demotion.
I have a 2021 5.3 Silverado and I have been driving GM vehicles since 1962. This is the first vehicle, new or used, I have been afraid to take on a trip for fear of an engine failure. GM should recall these vehicles and repair them before they fail. I have installed a Range DFM disabler. I hope it will help, but I am not sure.
Bought a 2021 Silverado in March, drove it to Las Vegas from Tennessee in July and it’s still in last Vegas.
We’ll go be fair. What happens in Vegas stays in Vegas.
I bought my 2021 Silverado and installed a DFM disabler at 500 miles. Today truck reaches 4400 miles bent pushrod lifer collapse it’s inevitable folks
The problem is for vehicle made from sept 2020 to feb 2021 coming out of the Mexican plant
Pandemic strikes again
so when should it be safe to start looking at gm again?
Good question. I’m staying a long way away. GM is not saying anything to limit a potential recall liability so it’s impossible to know if this issue is addressed properly. Keep in mind that there is a high failure rate with 5.3 and 6.2L engines from 2019 to todays engines with regards to lifters, pushrods etc. it ranges with engines with as little as a few thousand miles and up. If you drive your vehicles more than a 100K mikes then even an extended warranty (free from GM or paid for) is of little comfort. If you turn over vehicles every couple of years then at worst you face a week or a month without your ride. Its not worth the hassle.
Even if truck is made in Mexico, aren’t all the engines made in US? Do you have a link to that info? Thanks
Had a oil pump failure at 90.000 KM and two lifters cyl #1 at 99.000 on my 2014 sierra 5.3L that cost me 6300$ CAD.I miss my silverado 2004.Now driving RST 2020. Now you can say that they are garbage chinese truck.No more american truck.
Yeah. Those GMT800s were some of the best trucks GM has ever made.
They had their issues.
Drivetrain was solid.
Body was terrible for rust. Cheap brake lines. Bad gauge clusters. The damn tailgate issues! I can almost bet you any 800 still on the road has some or all of its brake lines replaced.
Weird the gauge cluster in my 2002 GMC Sierra works fine even after 257,000 miles.
2nd stainless steel brake lines are $800.
New engine or transmission or differential? THOUSANDS of dollars.
I much prefer the GMT400 trucks myself.
Those are even worse for rust.
If you drive in salty roads for 20 years you will get rust. Period.
Being in Michigan you just learn to accept the fact that if you own a truck here it will rust and just deal with issues like brake and fuel lines when they happen. I’ve had 3 different GMT400 trucks and for me the sweet spot.
I have seen a few oil pump and lifter failures, but never in one that was properly maintained.
Oil changes are cheaper than engine changes, and I currently have 420,000km on a 5.3 that has never been apart.
I guess all those folks who have had lifter, push rod problems before the first service interval should have changed their oil at 1000 or 2000 miles.
If they are Chinese then they can’t be American.
Maybe it’s time to go back to the 2000s trucks and save your $$$.
257,000+ Miles on my 2002 Sierra with the LM7 5.3.
ZERO engine issues
ZERO transmission issues
ZERO differential issues.
I’ve got a 99 tahoe with the good 350 runs great burns a little oil but starts every time almost 300,000miles on it, they need to quit messing with what works. these new trucks and the DOD system is junk, go back to what works, tell the R&D guys to quit over thinking things and build what you build best
My 2009 Silverado has the same naturally aspired 5.3 flex motor, Chevy is acting like this is a new problem. This problem should have been recalled years ago
My 2009 Colorado had the same thing. It plagues basically every engine with displacement on demand type systems. My dad’s 6.4L ram 2500 had the exact same issue too. It sucks, but it’s usually fixable… Just most people get scared off by having to replace the cam and lifters and everything.
My 2002 5.3 has 407,000 miles and purrs like a kitten.
It’s either design or they’re buying crappy parts. Either way AFM is screwing up a lot of engines. Not all of them, but quite a few. All that pain to get maybe 1 or 2 additional mpg’s.
I would not doubt that the engineering for these parts has been done overseas.
More than likely.
gm has seriously dropped the ball on quality control.
A new 6.2 does not have afm or the lifters that caused the previous failures.
Different design so my guess is bad valve springs
6.2s do have AFM
Can you provide proof other than your statement?
I have never seen a 19 or newer option for a 6.2 with afm. They all came with the new dynamic duel management.
Totally different system.
They have DFM now. Dynamic fuel management. They can now deactivate all the cylinders not just the 2 on each side, so afm on steroids. Lifter and/or cam failure are happening more than you think. Doing at least 2 a month for years now. I believe it’s more people depending on the oil life monitor to tell them when to change their oil then doing it by mileage (3000-4000 miles). Oils cheap compared to these repairs. Just tore apart a ’19 that has already had engine replaced do to oil consumption and now is back because a lifter came apart and bent push tube. Quality seems to be lacking for such new vehicles.
Brand new 2021 6.2 with 6000 miles just failed us on long trip. Lifter. Oil changed at 4500. tow truck driver said he has picked up three already this year, brand new.
DFM
It’s the design! Turn off the oil on a hot moving part and expect it to last,that’s dumb!!!
Not sure how thats the issue.
Neither afm or the newer skip fire turns off oil to moving parts that require lubrication. They use the oil pressure to create an actuaction the way a hydraulic cylinder causes movement. Those systems can last years with no issues.
To me dirty oil and poor maintenance seem to be a culprit. I just traded a 2011 yukon xl denali with a 6.2 afm 250k miles that still works flawlessly and has 35 psi hot. 6k oil changes with mobil 1 for its whole life.
But the afm systems definitely have added a level of complexity that I’m not sure justified the means
How could it be dirty oil and poor maintenance when they are failing before the first oil change is scheduled? My 21 Trail Boss is in the shop now waiting for lifters with less than 3000 miles on it.
I hear you. Same here, 21 Trailboss 13000 miles. Went in yesterday.
Same here 15,000 mikes
Happened on my 21 Tahoe two weeks ago. Replaced entire passenger side lifters and bent rod.
Today, same thing again. Drove it to the dealership and parked it.
Literally just had an oil change and 15k service done yesterday, and it failed today.
Same here. Yesterday. 2021 Trail boss 6.2 6000 miles left us hanging in middle of long trip. Lifters. One oil change 4500 miles. Tow truck driver knew exactly what it was, and confirmed when it got to dealer. He has picked up three already this year, brand new Silverado 1500’s.
2021 Z71 Tahoe, 8400 miles, lifter failure. Dealership is telling me they can’t replace all lifters, only the bank that failed. So they are literally setting me up for failure.
Have fun waiting for thr head gaskets, I’m going to be at 30 days before mine even sees the service bay.
Just went past 30 days on my 2021 RST Silverado. I think I’m done with GM
shouldn’t of bought that overpriced, unreliable 2021 Tahoe.
Consumer Ignorance has a price.
An idiot response to what’s happening.
If dirty oil and lack of maintenance is the issue, why is this happening to vehicles less than 1 year old and in some cases less than 1k Miles? Or in my case less than 1 year old and 4700 miles. My oil was actually changed at 4100 miles (oil life said 55%). Don’t give me the bull about it being a supplier issue either as the vehicle still isn’t right after all 16 lifters replaced and 4 trips back to the dealer. I’m actually in lemon law territory now and actively pursuing it!
Get your money back on that Lemon and buy a low mileage 2000s GM truck.
Then you won’t have to suffer through this again.
All because of the Govt. Mandate for Corp gas mileage.. 1 or 2 here or there by the millions adds up and they aren’t taxed by the Govt. for meeting the mandate, but we the consumer suffers.. govt. BS
And there is an easy workaround for that.
Don’t buy new trucks. Buy 2000s trucks instead.
Had this issue TWICE on my 2015 5.3 Silverado. Traded it for my 2020 5.3 LT. Now I read this WTF!
WISH I KEPT MY 2002 4.3 Silverado single cab 1/2 ton ….. bulletproof!
Trade in the 2020 for a 2000s GM truck.
You can still find good ones with under 80,000 miles.
Hey Evan! How much does GM pay you to comment your BS on this site?
Why would GM pay me anything to advocate for buying used older trucks? GM doesn’t gain any profit from it and in fact if the market shifted away from new trucks GM’s bottom line would take a huge hit.
You might want to think before you comment next time. Or just keep your American Ignorance to yourself.
Freaking sad they just dont make them with the pride like they use to
Scotty Kilmer (You Tube) was absolutely right!
I have 2010 suburban 400 k miles
No problems with anything in engine but always since I got the truck @ 50 k I use Mobile 1 oil and
LUCAS OIL STABILIZER. I still owns it
I have another 2015 Suburban , same thing, mobile 1 and LUCAS ,now 240k ,[ I need transmission ] engine runs perfect , btw oil changes 10-12k
10,000 miles on an oil change is extreme and foolish.
As Scotty Kilmer said. Oil is cheap. Engines are not.
This isn’t a new issue! My 2008 silverado had the same issue. It went to the dealer 4 times in the 4 years I owned it. Once for a broken valve spring and 3 times for lifters. I spoke with several people at gm about it and the only thing they really did was make sure I would never purchase another gm product. If it’s a supplier issue it still falls on gm to correct the issue. I would have thought if it truly was a supplier issue they would have found a new supplier by now. I feel bad for anyone who purchases one of these vehicle and my suggestion is always get rid of it before it drains your bank account.
Couldn’t agree with you more. GM should be installing new motors in these $60,000.00 plus cars and trucks. What a complete sham by GM. They expect you to feel good about spending 1 1/2yrs salary on their product than walk away from you when they have a problem. COMPLETE BULLSH*T. TERRIBLE CUSTOMER SERVICE !!!!
Just put a mask over the grill
I bought a Toyota Tundra, tired of GM engineering problems to keep their shops busy! For as long as vehicles have been in existence, we should be able to go 400,000 miles without any major problems!!
I changed to a tundra as well. So much better vehicle than the GM junk. There really is no comparing them. The tundra is old yet years ahead of GM in reliability. My Sierra had 31 issues and some major ones (motor) compared with my tundras 1 issue. The 1 issue with the tundra was the aftermarket remote starter that I had installed when I bought the truck. So far the Toyota has been flawless. Main difference is that Toyota has Japanese quality control while GM has none..
I worked at a Toyota dealership and to suggest they don’t have qc problems is disingenuous.
A reliable vehicle is not necessarily a nice vehicle …
Oh I know. Nothing says nice like spending nearly $100,000 on a truck or SUV then having it end up in the shop with a blown engine at 5,000 miles lololol.
Fortunately Interest rates are rising and the party is coming to an end.
That’s where I’m headed. The only truck that’s mostly built in the USA! The Japanese have their sh*t together and know how to build a truck. GM, Ford and Dodge have sold their souls to outside influence. It’s a shame. Never again will I purchase a so called American built car or truck.
Or you can buy an American Truck from the 2000s Like I did.
The 2000s GM Trucks are built as well as any Toyota and they cost half as much. Plus they are easy to work on and repair as necessary.
Active fuel management is the problem and the technology is not there. I used to be ride or die gm but the epa has forced things that are un doable good luck gm. I see you just invested a ton into some climate change bull. You better start thinking of your own future if you plan on being in business and stop letting the government shove you around
New leadership is required for survival. Someone who realizes happy customers buy again. Unhappy customers go elsewhere.
I am a GM technician at a store in Canada, we currently have four vehicles waiting for their lifters to be replaced. None of them have made it to their first oil change yet. The biggest issues is the lifters and head bolts are currently on back order. I read some comments claiming that it’s new “lower case gm crap” and if I’m perfectly honest, as long as these engines have had active fuel management this has been an issue. Why it’s such a big issue now is the lifters are failing way sooner than they used to. And it used to be at random mileage when it happened. Now it’s within the first 5-10,000 km. Another issue is gm keeps changing the way the engine deactivates the lifters trying to fix the issue, but it makes it worse. There used to be an oil manifold that is in the valley of the engine to control it, now it’s 8 individual oil solenoids.
Are these engines with lifter failure the newer design dynamic skip fire engines? Asking because I thought those designs used a standard lifter set and only the rocker arm was responsible for deactivation now.
The issues and bulletins are related to the newer Dynamic Fuel Management system specifically the push rod V-8’s, which uses a “spring loaded” lifter as active fuel management did. The rocker arm “lock pins” are used on overhead cam engines.
Thanks Sam
My 2021 Silverado 5.3 L engine with 10,000 km failed last Friday. Hell of a racket under the hood. Dealer/Shop says lifter issue. Played dumb on this being an inherent problem. Have been told it will be weeks until parts are available. Now I read here it is recurring after initial repair. I want my money back.
Absolutely right!!!! GM should be buying these P”SOS back that they turned out on to the public. This pisses me off that a so called AMERICAN COMPANY would do this to their patrons that I will seriously NEVER buy a GM product again. Their lack of empathy and their out right unwillingness to fix their own sh*t right is unbelievable. These are sad days for Americans when you can’t trust a Company like this anymore.
Damn that 0w20 tho
I bought a 2018 already replaced transmission at 130k and power steering at 150k. Power steering locks up and hard to steer spent $8000 since March. Called GM and they really did not give a dam about safety on the steering locking up
You made the mistake of buying a 2018.
Should of bought a 2000s truck instead.
My 2011 GMC Yukon XL Denali 6.2 V8 did the exact same thing this is nothing new. Got a 2001 gmc 1500 5.3 with 380,000 miles no issues. Leave it to GM to Mess a good thing up.
The 5.3 and it’s predecessor, the 4.8, are essentially 400k engines that GM ruined through the addition of AFM. I own an ’09 Avalanche with 350k miles that’s spent the last 4 years regularly towing a 7000lb 28ft camper. It 5.3L engine doesn’t use a drop of oil, has good compression on all cylinders and maintains good oil pressure even idling and hot. The transmission is also original and has never needed servicing – still the original tranny fluid.
The trick is disabling AFM as soon as you possibly can. I would be cautious of any used 5.3L AFM equiped truck with more than 50k miles. GM isn’t stupid and they do extensive endurance testing on everything. The were fully aware that adding AFM to these engines would reduce average engine life but testing indicated that the fraction that would likely fail during the warranty period was small enough that GMs overall liability was limited and easy offset by the gains in mileage and reduced emissions. They calculated that AFM equipped engines would last until the warranty expired at which point it would become the customer’s issue. If the problem happens to start showing up during the warranty period, just make them do a bunch of oil consumption tests to deflect blame long enough to pass 60k miles.
You don’t need to replace the lifters or make any mechanical changes to the actually engine to disable the AFM. Just get a handheld tuner and disable the 4 cylinder activation. Done.
The other critical things are using full synthetic at every oil change (6k miles between is fine), keep the oil screen behind the intake clear and opt for the factory HD transmission cooler or install a quality aftermarket cooler. A $50 transmission cooler will literally double your transmission life (easily). Also, then towing thru mountains in high heat, keep an eye on the transmission temperature reading on the info display. If the temp goes beyond 200F then back off a few MPH so it can catch up. If it gets to 215 then pull off at an exit and let it cool down for a bit.
Another important note on the automatic transmission – do not do any fluid flushes or change the tranny fluid despite what the quick change tech might be telling you. Engines are on open system that take in dirty fuel, dirty air and burn it which produces carbon and other byproducts that end up in the oil. An automatic trans is a CLOSED hydraulic system. It’s sealed. The only particles that can end up in the trans fluid are small particles from wear on the clutch packs and bands. As these components wear the particles suspended in the fluid begin to essentially function as friction modifiers that will keep the transmission components from slipping as they wear. Flushing the trans fluid removes these particles which makes a higher mileage transmission more likely to slip which increases heat in the transmission fluid and shorten it’s life considerably.
I’d also recommend avoiding E85 ethanol when fueling. Even on a flex fuel vehicle ethanol is harder on fuel system components than gas and its tends to absorb water which is not ideal
A lot of the 5.3’s in your 2009 era had consumption issues from ring failure.
I believe gm did something with a new ring design that was failing. Even the 2.4 I4’s with no afm were prone to failure back then.
This is BS. I have a 2009 Yukon XL I had to have the engine straight up replaced in. It is the 5.3L.
I now have a 2019 Sierra Denali Ultimate with the 6.2L and this is still an issue?
And to the person that said the new 6.2L doesn’t have AFM, you are not correct. It has DFM, which is the “new” version of AFM.
I wish GM would get their crap together!
Totally different system.
Afm used special lifters with two separate actuation valves in them. 1 was for the typical hydraulic lifter takeup, and the other allowed deactivation of valve.
The new 6.2 uses dfm or dynamic skip fire, which actuates at the rocker arm. the lifters are supposed to be standard lifters.
this is a much better system due to more flexibility. But the big difference for me is now if it does fail your changing a rocker arm by removing the valve cover instead of pulling your heads to replace bad lifters. A rocker arm is a pretty easy job that most people can do in the garage over a few beers.
Now the 5.3 is still being sold both ways. Afm and the newer dsm, dfm, skip fire, whatever it is.
A lot of misinformation it seems. I have a 2020 at4 with a 6.2. I am glad its a dfm and not the older afm just for user serviceability. But i prefer if i dont have to learn too much about it by working on it. Lol
Wrong, they use afm style lifters for all the cylinders. The rocker arms are standard. Oil pressure latches and unlatches the lifters. Just had 2019 6.2 apart.
Ok so the skip fire system apparently is using the lifters on ohv engines and the rocker arm pins are for ohc engines. Watching the videos of how it worked showed rocker deactivation.
I was really hoping these new engines got rid of the the lifter setup. Time to buy an extended warranty.
My 2021 Trail Boss with 9K miles has been sitting at my local midcoast Maine Chevy dealer lot with a collapsed lifter for almost two weeks. The service manager does not say when a lifter bank replacement might arrive. They’ve given me a reliable and fully equipped F150 loaner, and my wife says the Ford seats are much more comfortable. My first great GM ride was a ’70 Chevelle SS. We’ve had four reliable Tahoes over the last forty years, but this lifter mess is a real game changer.
Yes sir my friend 70 Chevelle ss now that a machine a real car ! With real power and you can beat on it all day and never brakes when gm made real cars and trucks !!
NEW Built in July 2021 Trail Boss /miles 1,849..In Shop Now LIFTER PROBLEMS..?VERY DISAPPOINTED
It is a JOKE. GM is a JOKE. I’m so pissed off at this company for letting these trucks even get to the market. This sh*t GM is producing now is comical. The only way GM fixes these issues is to replace management and start to have some pride again in what they build. This Company has dropped below the pass meter in anything their doing right now.
Was it a Mexico or US truck. Not sure that matters cuz I think all engines are US made. Thanks
My 2021 Trail Boss with 9K miles has been sitting with a collapsed lifter in my midcoast Maine Chevy dealer’s lot for almost two weeks. The service manager has not called me to say when a replacement lifter bank might be available. I’m driving their fully equipped and well appointed Ford Sport 4×4 Ecoboost dealer loaner. It’s a very nice truck. My wife says the seats in the Ford are much more comfortable. My first GM ride was the fantastic ’70 Chevelle SS, 454 LS5, red on red with black dorsal stripes. Over the last 40 years we’ve owned five reliable Tahoes including our current 2018 LT. This 2021 5.3 liter lifter mess is a game changer. I’m just wondering how many hours away from the nearest tow truck in remote northern Maine I’ll be when another lifter collapses.
2021 1500 Silverado, 6.2. 7600 miles , letters just went. Dealer says they are going to replace both sides. Had the oil changed at 3800 miles. Was just getting ready to do it again. My son and buddy both have 2017 Silverado’s. Trans shutter on both. My sons has now been in 4 times for. I’ve owned GM for over 50 years. I’m done!!! Should have my 2012 Silverado with the 5.3. My father was a mechanic so I was involved and a good friend of mine has his on garage. I can count on one hand how many lifters the three of us replaced in over 50 years and trust me the ones that were done has in excess of 80k miles on them. This is pathetic
Only major difference in DFM, outside of the ability to kill up to 6 cylinders independently is the the dropped the oil manifold from the AFM system for the sake of 8 individual oil solenoids to control the lifters. DFM still uses the AFM style “spring” lifters, they may be redesigned, but the concept is effectively the same.
I had the same issue with my 2014 6.2L. One of the problems is the use of the 0w20 oil, it becomes way too thin to protect everything. Need to use a thicker oil 0w30 or even 0w40 will have better protection. Plus also best to have the entire bank replaced if one of them goes.
Actually I’d do what I’ve done in my 2017 Hemi Ram, go to 5W30 and ALWAYS use synthetic oil!