THE GM ENGINE DISASTER! TAHOE, SUBURBAN, SILVERADO, YUKON, SIERRA, ESCALADE ARE UNDER INVESTIGATION!
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- Опубліковано 5 лют 2025
- Finally someone is looking into the gm v8 engines and their failures. Today I talk about the recent NHTSA investigation regarding their engines enjoy!
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Due to factors beyond the control of The Enthusiast Mechanic, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. The Enthusiast Mechanic assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. The Enthusiast Mechanic recommends safe practices when working with tools or equipment seen or implied in this video. Due to factors beyond the control of The Enthusiast Mechanic, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained.
Cylinder deactivation is a CAFE-driven situation to squeeze the last 1/4 mpg and was never a consumer demand. Get rid of it please.
Does anyone expect any less from GM.
Get rid of government instead.
@@GatorsWin EPA is trash
Theyve had cylinder deactivation since the eldorado days. How is it that they still cant get it to work 20 yrs later. I believe it existed even before thay
Agreed, let's get rid of the Auto/start stop crap they put in my Nissan Truck and Honda car too. The recommended 0W-20 motor oil is a gimmick too just to squeeze a extra half mpg on your mileage. No thanks, it gets drained and I put 5w-30 in it the minute I bring the vehicle home.
The problem is the government forcing the manufacturers to meet insane CAFE requirements. The end goal is EVs or just forcing people to not drive.
Yep
...Yes of course, the feds are passing a law banning sale of all new gasoline cars by 2035! If I still walk the earth by then, it sure will be interesting to see how simply BANNING 265 million vehicles will play out. But since it's from the government it's bound to go smoothly. They have 10 years advance warning after all.
You are correct however not an excuse for GM and these failures. GM simply does not care to fix it. With all the R&D GM is capable of doing there's simply no excuse.
It's insane that people buy these big gas guzzling vehicles. If people drove normal sized cars this wouldn't be an issue. Take away the incentives to build gas hog SUVs and trucks and tax the hell out of gasoline.
You don't tow stuff or haul things, do? @@gigglybeast
They should be under investigation for the 5.3. I had 2 within a couple months same year, same mileage, same failure.
I agree the 5.3 L V8 also have the same issues. They are basically the same as the 6.2 L V8’s I’m sure it’s gonna be a trickle down effect where once they figure out one has an issue it’ll quickly come to light that the others are also problematic. The cylinder deactivation system that causes all these issues as the same for both versions of the engine.
Wow what years ?
So far 19 to 24 year models
had a 2000 with 40,000 miles and horrible piston slap. never bought chevy again.
Yes
And this is why I drive a 24 yr old car...
32 year old still runs like a top
@desertsasquatchxploration1568 r2001 Grand Marquis! Right on.
25 yr old car with a 3800. Pretty sure the engine will out live me.
2000 ford f-150, 5.4 litre, 2 valve triton engine, 308,000km's. My sweetheart, keeping her till she dies!
I'll avoid any newer truck as long as possible......
Engine machine shop here. We also see dozens of variable oil pump failures. Guy driving down the road it opens flow and boom locked up in short order
Thank you for your input! I love to hear people's perspective that work on these and what they see.
yup. L87 is the only one with the variable pump. L83, L84 and L86 don't have them which is why only the l87 is being investigated.
So what is your solution?
Need to include the EPA in the lawsuit also
100% get rid of the EPA!
Excessive EPA mandates on the auto industry are ruining a good thing. Or trying to put it out of business.
Agree 100%
For those guys with L87 6.2 or 5.3 with no issues yet change your oil at least every 4000 miles. And invest in AFM/DFM disabler . Keep your engine in v8 mode all the time . This should keep your engine running for a long time. I have a 2020 Silverado high country with the 6.2 I bought it with 47,000 miles I installed a AFM disabler from range technology’s. I now have 163k no issues whatsoever. And of course I change my oil every 3500 miles.
Or just don't buy GM
@@roofcamper3473like the guy said, the car is beautiful.
My '21 Silverado with a 5.3L has no afm(from the factory). Almost 50K, no issues. I'm more worried about the transmission.
@@markdanielczyk944how’d you get no AFM?
@eurowerx4267 The dealer called me and said I could get my truck faster if the afm was deleted. So I said"Make it happen". And GM did!👍
#1: Blame unelected 3 letter bureacrat entities. And the politicians and voters who enable them.
#2: See #1.👆
Unelected bureaucratic entities who have power over us....Ouch!
TRUE THAT ! ! !
Put in place by the evil dems.
GM knows exactly what they are doing and how reliable their engines are (remember the ignition switch part number fiasco). Here is the deal: GM tries to get higher mpg for the government at the expense of the consumer. I think mpg should be indexed to reliability for a more realistic way to improve mpg over time. Consumers are getting screwed over big time, and buying the overpriced crappy vehicles does not help the situation.
Right on the money!
I was a GM guy for 25 years. Stuff was easy/cheap to work on as a mechanic. 2014+, I am done. Gave up on GM.
The cylinder deactivation is what ruined them (AFM/DFM) it lost a lot of consumer trust. If they made good power trains they would be doing better financially.
Ford is junk too with their wet belts and faulty cam phasers.. trash
@@TheEnthusiastMechanic Let's not forget about chronic timing chain failures on the 3.6 V6.
Scotty predicted this exact thing. Unbelievable.
Who would have thought constantly starting and turning off your engine could cause problems?
Get the government out of the car business and our life's and all will be well. The EPA needs to be investigated.
Cognitive biases much that what government does it's actually not all that draconian and it's reasonable. Maybe geriatric motors and the bunch should just build the systems correctly. That costs more more money though, and if they make them poorly they will fail and selfish ignorant people will do their bidding. Isn't that super sophisticated, someone call me a spin doctor 😂 I agree with you about government and being as how were all type A dickswingers and follow no man😂 I move for governance with no government.
MAGA
IMHO: Everything post COVID has turned to s**t, quality control, durability etc. Includes cars, trucks, RV's, boats, motorcycles,household products🤯
It seems like they are rushing the production to get things out and cut corners to get it done
I have a friend that experienced this failure on a 9,000 mile truck. Not even 2 years old. It keeps me from buying a new one.
We need to remind the NHTSA that the bearing is not the only GM truck and suv issue. Anyone who has had a fuel module pump failure and it left you stranded or died in the middle of the road, please submit a report to the NHTSA
Had a fuel pump failure on my 2002 firebird at 49,022 miles on a cold rainy night in Oct 2007. Cruising along the highway and noticed it seemed to be slowing down. Sure enough, I coasted to the side of I55. Thank goodness I had just gotten a cellphone.
Good video. Life long GM guy myself. But my last two have been Chrysler Products. Just wanted to remind folks that their V-8’s have the same type of systems and the same problem. AKA: The Hemi-‘Tick’ .
I’m a life long ford guy .
My LM7 5.3 in a 03' Sierra has 236,500 miles and doesn't miss a beat. I do need to fix an oil leak. Otherwise it is great, and I expect another ~200k. I don't want any newer vehicle with failing engines, modules, displays, etc that won't be available in a few years
The older ones are definitely the way to go! Your truck is a few years before they introduced AFM it came in 2007. You have one of the good trucks that can go for years I’ve seen them reach 400k easy!
thats becouse its an 03, the older ones were pretty bullet proof. BTW my 1991 gmc 2500hd with the 5.7 has 400,000 miles
hey man baby that thing for as long as possible I had a 2001 sierra 5.3 that I pushed to 355k and still ran great when I traded it in for my pos 2013 that ended up being a nightmare purchase..
01 Yukon, 5.3 no major issues knock on wood. Changed the knock sensor, under the manifold and cleaned the air flow sensor. Regular oil changes, so far so good. Noticed newer cars with turbos, and electronics seem to have more problems.
@ the 2001s are stellar engines. They don’t have problems these problems start happening after 2005 so you’re in the clear with your vehicle.
My 2013 5.3 has afm disabled per obd and 213k miles hoping to be driving another 100k miles.
Thank you for sharing your experience. I always love to hear from people that have the software disabler through the OBD port. If it really does work seems like it has for you.
@@TheEnthusiastMechanic yes over a year now and gives me peace of mind. Figured as engine ages those lifters will likely collapse and fail to extend.
That’s what I hear about the OBD style software disabler that it works, but eventually overtime those lifters will have to go because the hard parts inside can still go bad technically, but it gives the engine of fighting chance to make it longer.
When I was looking to get a 2023 suburban, I looked into the disabler software, but I couldn’t really go with buying the thing knowing that it was just something that could break down eventually. Thank you for your input. I appreciate it.
I replace the lifters, cam and oil pump when I do it. I then disable the AFM/DOD in the computer with HPTuners. Yeah it costs $500-700 dollars, but it;s literally the only way to totally prevent failure.
@@TheEnthusiastMechanic The only way is to use software like HPTuners to disable AFM/DOD in the ECU. Those disablers are junk.
The biggest problem is engineers are told " How cheap can we make this part." Not " how can we make it better."
Im a tech at GM Dealer and we see about 1 or two engine replacements a week all with the 6.2 noting to do with lifter failures either the main bearings or the rod bearings seize and lock ups the motor. I had one i was inspecting for a certification and it locked up on my lift immediately after a oil change. No signs of metal contamination and never knocked or made a sound. Most of the people who brings them in unfortunately say their motor locked up while driving. Which poses a huge safety hazard. Issue is so bad the 6.2 has been on backorder for over a year now. When people ask me which truck they should buy i tell them buy anyone that has a 5.3 or buy a 6.2 thats still within power train warranty
Thank you for sharing your experience from the dealership side of working on them that’s crazy how one of them locked up on the lift,
Why are 5.3L better than 6.2L in this situation. Is it not as big as an issue with 5.3L or is it one of those things that will play out in the coming months and the 5.3L will soon be added to the list? I bought a Tahoe 5.3L but concerned. This is my first Chevy as I drove Toyotas for two decades. Toyota has their own issues right now so I decided to give Tahoe a try.
Honestly, I love it. Nice ride, smooth and all but concerned about this issue.
Would a AFM/DFM disable tool mostly eliminate the failure potential?
They are all prone to it. If you use a disabler and change the oil frequently you should see good results. Even that is a band-aid on a wound so to say because they still have the hardware, the lifter in the engine that will go out with time.
Nice to hear a person that is informed, and experienced add information based on facts and not misinformation. The information i have found it may be associated with a change in bearing supplier, I have an acquaintance with a 2023 tahoe 5.3 that threw a connecting rod at 7,000 Miles I am watching this unfold as I have a 2020 yukon with the 6.2 with 70,000 miles.
@@TheEnthusiastMechanic I have the 22 sierra denali refresh. 5.3. No cylinder deactivation due to chip shortage. 27,000 miles Should I be OK?
I recently got rid of 2018 F 150 with engine that burned 1-2 quarts of oil every week starting at 65000 miles! It was the V8 engine as well. It was a company truck and was replaced with a Dodge ram 1500 so no cost to me but we had 20 of these and all had significant engine and transmission issues so quality issues are not confined to GM! Having said that last year in February my youngest leased a F 150 XLT with 3.5 EcoBoost and first 15000 miles zero issues! One thing I am doing is changing oil more frequently than 7500 miles. I think initial breaking in need to clean out the trash more often than first change at 7500! This has nothing to do with viscosity but getting the metal out of engine during its breaking in period and the more extreme heat you face, I live in Houston and temperatures hit 100 plus in May and stay above till September. Maybe I am wasting money, but engines used to last 150,000-200,000 miles with gas engines and lots more with diesel engines and now you are lucky with gas engines to get anywhere near that figure !
These problems are making me glad I didn't trade for a new Silverado and instead am planning to keep my 2018 with the L83. The AFM on my truck has been disabled since around 65000 miles when I started driving, and I hit 100000 miles just this week. My L83 is still running good as it was from the start, and even though there are a fair share of complaints about the 6l80 tranny, mine has seen no problems whatsoever.
That tranny will do you fine with regular maintenance, & no abuse.
My 1996 Silverado 5.7 has 206,000, it was a better engine.
@melissasmess2773 Yup, all the older Vortec/LS engines were better. These LTs are all kinds of wiring messes and problems, which all boil down to GM's genius AFM idea. I was simply stating how even my generation was better than the new, given I've never seen a 14-18 fail like these.
My friend’s GM truck with this engine had stuck lifters that messed up the cam. $10K to repair. Dead (inactivated) cylinders are known to mess up engines.
The Ones causing this Problem is the EPA.
I worked for Navistar, Peterbilt, And GM.
The EPA has been Calling the shots in the Trucking industry for years AND Calling the shots at GM.
Talking too Engineer's, they ALL said they Can't fix the issue BECAUSE long story short, the EPA won't allow them too.
If in fact these failures are the fault of GM due to CAFE standards explain how GM got away with selling trucks without cylinder deactivation during COVID.
I have one. That is why I am keeping it
A guy I work with has one of those with the 6.2L. I didn't believe him so I looked it up. Yep some were built with no AFM and Dod. I told him that he had better hold on to that one.
They also need to do something about the garbage fuel pump module that is guaranteed to fail across many models from trucks and SUV's to crossovers and cars. They fail all of the time without warning leaving you stranded. To make matters worse, when it fails and the vehicle won't start, if it's equipped with an electronic shifter, you can't get it out of park to push it off the road. It has to be dragged onto a tow truck. It's literally dead where it sits. There should be an override to get the transmission into N on all of them if the vehicle is disabled and won't run. Every other manufacturer has one.
Yes they should do something about them, those things are notorious for failing!
Around 2008 my boss said we did ten GM pumps for every other brand that failed. We made lots of money and no body washes out the tank before installing new pump, the replacement doesn't last as long as the original did. 🤑
GM never got 4/6/8 cyl technology to work in the 70’s either…….no surprise…….they tried to convert one of their gas engines to diesel with similar results around the same time 😎
Oh yeah, who can forget the V8 block that they turned into a diesel just because they could and they thought it would be a great engine😂
EPA must be abolished. AFM and DFM must be removed for the GM engines. Government and EPA must be removed from the market. CAFE standards are killing the vehicle market.
Sad thing is- they know how to make an engine that will run 400k miles without issue. They just cant because of gubment regulations. They could a;so make a frame, brakelines fuel lines and body parts that dont rust - thats on GM
Dorman brake line set $92, Trans cooling line set $60, fuel line kit $100 and a gallon can off surface shield every couple years for $70 and you got a truck without AFM that will give you 400K miles. less than half a monthly truck payment.
I have a question if you can help me 🙏 I have a 2017 Yukon Denali with the 6.2 engine. Just over 40k miles. Runs great no noises or knock that I can hear. I did buy the disabler that goes in to the obd port at around 30k. Since then it’s been running to much better. Shifts smoother and to be honest I don’t see any fuel consumption difference. My question is can the lifters still fail? Should I just bite the bullit and consider changing the lifters to normal lifters. Or just selling it? Thanks in advance
@@adalbertobarrera4130 to answer your questions if you have the AFM/DFM lifters yes it can still possibly fail. There have been many documented cases where people have the disabler and they still have a failure.
As far as what you should do about it or with it, I can’t really answer that question everybody has different things going on. I cannot tell you to disable the system, although that would be a good thing for the engine to completely remove that junk from it. That’s something you’re gonna have to think about it and see what works for you as far as your finances and lifestyle.
Yeah I mean if getting rid of all that junk can save my engine in the near future I would consider doing it. Just depends how much it would cost to do the job. Like I said right now it runs great with no issues. I do my oil changes every 5k. Thanks again
Just change your often. I have a 2016 Yukon Denali with 180,000 miles with no problem. Yours (and my) Yukon have a L86. The L87 is the one that this video is about. The oil pumps and oiling systems are diffeent between the L86 and L87. Don't let videos like this scare you in thinking you have a problem. This investigation has nothing to do with AFM/DFM. The L87s are experiencing rod failures at the crank. There have been 39 complaints out of 870,000.
I have a 2007 Tahoe with 278 thousand miles. The Afm has been fixed twice. Great truck except the afm. I have it disabled trying to make it to 300 thousand. Still have original Transmission.It has the 5.3
Well, that type of mileage that’s about right when it comes down to the AFM system with the repairs! You are very lucky for as long as I’ve owned GM products they’ve always had transmission problems so you must have gotten one of the few great units that didn’t have issues. Hopefully you make it to the 300,000 mile mark and more without having a transmission issue good luck!
Yes it’s partly because of regulations but GM has known how bad they are still new. Deactivation system is for almost a decade now I have done nothing about it.
they had it since the 80's
I'm running a 05 Sierra I bought new with a 4.8L LR4 and now pushing 84,000 miles with a little rust. I'm looking for newer vehicle 2013 or older with the 4.8L L20 engine, THEY DON'T HAVE AFM but hard to find because few were sold. Everyone wanted the 5.3L. If your looking and find one buy it. Great engine.
I own one of these, 2013 4.8L L20 engine, only 50,000 miles on it, no rust, always reliable, I will never get rid of it.
The 4.8 is great. I don't think the 4.8 had AFM. I have a 2011 w\265k going strong. I did replace the Trans at 251K (2-4 clutch went out on the 4L60E -very common). Figured it was better to rebuild the Trans and keep it going vs buying something newer. Since seemingly all the AFM motors are crapping out. Only issue is towing isn't great with the 4.8L.
Just get a last year gmt 900 with 6.2 it’s the L9H engine with no afm…the whole run 07-13 1500 trucks don’t have afm in the 6.0 (07/08) 6.2 (09-13)… the Sierra Denali got the 6.2 -2 years early in 07’. The 6.2suvs are afm free too from 2007-2009 after that in 2010 the suv 6.2 went to afm
Well it's a good thing that they waited until there was nearly 1 million vehicles affected. And it not just in the trucks. It is the Camaro too.
dumb a$$ GM get rid of this cylinder deactivation, no customer asked for it.
*Oh no, it's another VEGA Motor class saga ... **_all over again_*
When and If a recall is issued, Those of us who Cherish 6.2 LS/LT engine blocks for their monster power , easily unlocked w/Camshaft change, will Celebrate.
As another Cache of the vaunted used engines leaks into our market place.
My sister's 2021 Tahoe had 2 dealer replaced engines and she had to buy a new engine 2-3 months ago - at 128k miles. All DFM lifter caused failures. She never mentioned the failures until after she paid for engine #3. Yes, 2007 was the first year of AFM and I've been against 2007+ GM 1500s for many years. The 2500-3500 platform is still good because the engines don't have DFM - as long as you get a good tune (and ATF bypass) to make the transmission reliable - stock tune is for smoothness and is hard on the transmission.
The 6.2 in the 07-13’s don’t have afm..the suvs with 6.2 are also afm free from 2007-09’…
My 6.2 failed last fall when I was on the interstate in heavy traffic. I was in the fast lane and it just shut off. Fortunately I was able to squeeze over to the emergency lane. That could have turned out very bad. Turns out the rear main seized up with only 52k miles on it. It cost me $13k for a new engine. GM picked up half of it. That tells me they knew they had an engine problem.
They have known for a while it's sad that customers have to pay up for the mistakes of gm
The 5.3 needs to be in on this.
I’m sure once the investigation picks up speed on the 6.2 L since the 5.3l will follow they have similar failure points they will probably get included in a little trickle down effect. In my book any engine since 2007 with cylinder deactivation needs to be included and looked at.
I will stick with my 2003 Sierra 2500HD 8.1 Allison 148K miles. Had it for 10 years. Reliable, easy to work on. Yes. It loves fuel but can tow pretty much anything I need it to.
You're lucky to have such a good one, it was a great motor and transmission combo!
Yes, you’re spot on get rid of dfm and afm
GM DOES IT BECAUSE OF THE EPA , NOT BECAUSE THEY WANT TO DO IT.
The EPA set a standard for all automotive manufacturers on what the gas mileage should be. However, with that said the EPA doesn’t tell the manufacturers how they should achieve that number therefore, this is solely on general motors. They designed the systems that are failing and these engines that are failing it is solely their responsibility for the design and failures! However I also don’t like how the EPA keeps raising the bar to these incredible high MPG’s that these engines have to achieve it gets to a certain point where an engine cannot get more and more efficient. They really need to cut out all that crap and let these engines do what they’re designed to do without restrictions on mileage.
@@TheEnthusiastMechanic Chrysler has had it's fair share of problems with cylinder deactivation as well. Maybe the technology as a whole is not up to snuff.
I agree any cylinder deactivate just isn't good at all!
@@TheEnthusiastMechanic The EPA is NOT forcing automakers to make 4 cylinder 2 liter turbo engines that put out 300 HP and go from 0-60 like instantly. No one is making them do that. Faster cars sell more easily it seems. Fuel prices are high yet the new cars today just get faster and faster. You squeeze out that much power and it's no surprise the engines start falling apart.
That doesn’t matter, if you can’t put out a reliable truck then DON’T! I’m meticulous with my vehicles, go over and above suggested PM. Replacing my 2016 5.3 with a Jasper as we speak for a tic over 14k with exactly 100k on the clock. I’ve owned all brands each with their issues but this is the first time a lifter failed (compressed due to AFM) and chewed up the CAM. Bought used off-lease at 42k and performed AFM delete right away.
Been loyal to GM since 1988,and this is how they show their gratitude to me and many like me.
Just hit the tow/haul button when you start a truck with cylinder deactivation and BOOM! It won't ever deactivate in tow/haul mode.
Yep and shift manually. I got 350,000 out of that crap transmission! I’m told that’s a record and I saved it doing this.
@@ProctorsGamble The 8 speed ZF transmission used for the last several years is not crap. Ram had some sketchy transmissions years ago, but for the past several years those ZF used in both the 1500 and 2500 gas trucks has been awesome.
@@huntsimple9527they're pretty awesome and tough, had them in a V8 BMW and my Mercedes Benz. Good German transmission.
@ I had the six speed and it has issues with torque converter failing and ruining the tranny.
@@ProctorsGamble I think the 8 speed ZF used for the past several years was a big upgrade over the six speed. When they switched to the 8 speed in the 2500 HD with the 6.4 L Hemi that made that powertrain come to life quite a bit more than with the older six speed.
This is why engines shouldn’t have progressed passed OHV/pushrod and carburetors. The more complexity, the higher probability of things breaking down and causing a headache. While older engines aren’t perfect, would run forever when maintained diligently.
I almost considered becoming a mechanic when I was younger, but lost interest when I saw how complicated today’s modern vehicles are.
Another reason I luv my 2013 Corvette..The reliable LS3 with no cylinder deactivation or direct injection..Unlike the 2014 LT1 Vette…
Ls engines are just legendary they are probably the best v8’s out there I personally love that platform.
AFM/DFM is there for EPA testing cycle not for real world fuel savings and reliability. The same is true for engine start/stop. It's tuned for the EPA testing drive cycle.
This is so helpful -- we were just about to pull the trigger on a new or used Suburban. What would everyone recommend instead? Is the Ford Expedition comparable? Would that be a smarter choice? Thank you!
I went ford but ford has its issues as well you'd have to research and find what works for your needs.
@@TheEnthusiastMechanic Thanks! Yea, read that Ford has timing component issues, where GM has the AFM/DFM ... each has goods and bads!
@ just make sure anything you buy has a warranty. I went with the Ford because the second generation eco-boost has a lot of upgrades that fix those issues.
Late model Armada-not the new rendition. Powerful V8, lots of room, great towing capabilities, very quiet, smooth riding beast.
@@TheEnthusiastMechanic thanks so much!
The other problem GM for the last 10 years or so is their transmissiions. Almost every person I know who has bought a GM truck from 2014 and up has had their transmission go out or had a major problem with them at about 60k miles or less. Some got lucky and got it fixed under a recall.
yeah, co worker of mine is on his third trans, 2014 1500 with about 150k miles. My 1991 has 400,000 miles on the original trans.
The Chrysler/Dodge 5.7 Hemi had cylinder deactivation starting in 2005. It is not known for cam/lifter failures until 2009 when they added variable cam timing. Maybe they started playing with the oil pressure for the cam timing? Maybe they added higher lift cams that stressed the lifters more because about 50 hp was added? I don't know but I do know that the cam/lifters were not a problem until they added the variable cam timing. I owned a 2005 Dodge Magnum with the 5.7 hemi that had cylinder deactivation (MDS) for 17 years and I had NO engine problems.
When it comes to cylinder deactivation, I feel every manufacturer has had hiccups with them, but the smart ones look at those hiccups and try to build a better product whereas I feel GM has not done that they just kind of said oh well let’s just push out this crap
@ And the amazing thing is that Ford built the new 7.3 gas engine the same way as the chevy and chrysler V8s and guess what. It has cam/lifter problems!!
AFM , DFM owners. Listen to your engines. If you hear the lifters clicking at start up check your oil level. Must likely you ar we low on oil. This is common with the 5.3. After a oil change check your oil level after 2000 to 2500 miles. These engines burn about 2 gts of oil about every 2000 to 2500 miles. If oil level is not kept up to normal level you will have afm,dfm lifter failure.
It is a shame that the owners have to monitor their oil levels so closely, that's just bad engineering.
I agree with you 100% if I was worried about gas milage I would have never bought a truck. I wanted the 8 cylinder because they are a much smoother running engine with great power and sound great compared to the 6 cylinder.
You’re right, there’s no substitute for the V8 feel and sound!
AFM has been phased out except for the base Trail Boss with the 6l80 trans. I wouldn't touch a new body style 1/2 ton. A new HD with the 6.6 would be my only choice. DFM is a huge failure. Running on 1 cyl simply idiotic. My 2015 slt Sierra Z71 crew has run flawlessly for 150k miles. Change your oil people. The 6l80e went 133k miles before I had it rebuilt. She's a keeper.
Friend of mine did just that and he has had half ton Chevy trucks since his 2nd vehicle. His last truck did the lifter failure around 60k miles. He just got a new HD and only did so because it hasn't got any junk on the engine
I have a 2021 Escalade
And I really hope it never happens to
me 😬
I have a 2007 5.3L. That AFM made my oil sludggy. They need to go all the way back to when they first had issues and people took them in for service.
If the Geo Metro was getting 57 mpg 30+ years ago, what would the modern day version be getting with all the new technologies? 100+ mpg with an 8 speed manual?
😂
This isn't the first time GM tried this. Just look at the cadillac v8-6-4 engines. They did the same thing. Cylinder deactivation kills all engines no matter who builds that engine.
Yeah, I'm surprised they haven't learned from those mistakes.
The ls series of engines were fantastic when they first came out. Owners were getting up to 400,000 miles with regular maintenance.
They build this crap for almost 20 years and refuse to deal with it. I feel bad for CEO Marry Barra. Her salary fell to 27.8 million last year. That's a 4% drop. I wonder how much more it needs to drop before they design a product that people actually want or at least pay to repair the thousands of vehicles they already have.
I have a 2017 Silverado with a 6.2 , 195000 miles. Bought it used with 171000. Haven’t noticed any engine issues but the 8 speed transmission does shutter. I drive very carefully so as not to blow anything up! Hoping GM will address these problems before I have to pay for it out of pocket.
I'd recommend keeping your eye on that transmission. If the 8-speed is shuddering, it's usually the first sign of a bigger problem!
@ bought a afm delete “OBD” recently. Seems to have a positive effect on the “shutter”
Not sure why it would affect the trans by canceling the “afm”.
If you have power to drive the transmission it won’t shutter as much
That why I’m glad I own a 2500 with 6.6 gas. No AFM!
This is why I’m glad I have an 05 who was not equipped with that junk
Another reason why my '69 Bronco is still my daily driver.
I've had lifter failure on a 2011 Suburban. I fixed it and disabled the system. I know several people that have also had the failure, and there are a noticeable number of them for sale cheap on the net - with bad engines! I still have my burb with 287,000 miles and running well...but I will not ever buy anything else with cylinder deactivation. I recently purchased another vehicle for work and went with a clean, well maintained 2003 Expedition with the simple, reliable 5.4 2valve. It will never have the BS of failed lifters or cam phasers. I do not care about a tiny percentage of fuel economy - reliability is king!
The days of 300k miles truck (new) are over. Blame unelected 3 letter agencies
My 2012 Silverado with the 5.3 has 203,000 and no issues. Trans feels like it may be slipping just a bit, but the engine is still good.
This is exactly why it makes much more sense to spend 28k-32k to rebuild my 2013 LML Duramax drivetrain for power, efficiency and most importantly, reliability.
For the past few years, I have seen a lot of people holding onto their older vehicles and dumping a lot of money into them to make them like brand new for that very same reason if you have something older that’s dependable and you’re not sick and tired of driving it I always tell people if it’s worth it and cheaper invest in fixing or rebuilding that vehicle and then you’ll have a solid vehicle on the road.
First came the government gas cans and now this . Cylinder deactivation and engine auto shut off at a stop sign . Where will we be in ten years ?
That’s a scary part regulations change so fast and auto makers have to try to keep up with it. They come up with these crazy ideas like we have here and the consumer pays the price in the end.
We'll be walking which is what they are really after anyway!
It’ not just the 6.2, it’s also the 5.3. Since 2007.
Remember the GM key fob issue ie the key start fault, it was estimated to require a 7 cent fix per vehicle, yes millions of vehicles. What did GM decide to do, not fix the problem but, fight the law suits of 107 deaths & who knows how many crashes. The lawyers basically "its cheaper for GM to fight" then fix the cars.
I had a 1991 S-10 pickup 4x4 extended cab that would get 20mpg regularly and had gotten as high as 24 out on the highway. Now they modify the motors and they do not perform as well.
It seems like those older vehicles were built to last.
Very simple; just don't buy that junk. PROBLEM SOLVED.
I have had 2 5.3 failures in less than a year. One with less than 42000 miles the other just over 100000 miles. Neither was abused both well maintained
Very common thing multiple failures in a short time.
It’s the government that wants the lowest fleet mileage. It’s the only way they can get their stuff on the roads.
^This. Many of these ridiculous systems that are targeted for better fuel economy is driven by Federal regulations. It's not about not giving what the consumer wants. Blame the idiot politicians. All companies have to meet minimum fuel economy standards which have been getting more stringent as the years go by. We'll see if the change in the administration will slow or turn things around. This is the reason why many manufacturers have abandoned V8s. The regulations are also targeted at forcing everyone into EVs.
It is true that car companies do this sort of stuff because of the EPA and government regulations requiring certain miles per gallon. However, if they design a bad system that has a failure point like this they need to go back to the drawing board and re-engineer or find a solution that doesn’t resolve in the problems that consumers are having because there’s trucks out there that are out of warranty that are basically ticking time bombs waiting to experience this failure
Does the 6.6LT engine is not braking
that one isnt affected
Ford Ecoboost has cam phaser issues
I believe Ford fixed the phaser issue on the second generation eco-boost engines
I have a 2017 Suburban with the 5.3 and AFM. A few years ago, I was told about an AFM/DFM disabler. It plugs into the OBD and keeps it in V8 mode at all times. Much cheaper than a $5000 repair. I bought the disabler on Amazon.
I have heard good things about those disablers, glad it worked out for you!
Read the gm forums, even the people using disablers are dropping bearings and/or lifters .
Now with SCOTUS and the Chevron decision, auto and motorcycle manufactures NEED to tell the EPA to GFY's, Force Congress to do their jobs and not off load to to an UN-ELECTED bureaucracy!
That is one reason 1 1/2 years ago I bought a new Nissan Titan Pro4X. No cylinder deactivation. No stop/start. Hydraulic steering. 32 valve double overhead cam V8 engine that has been supplied in the Titans since they were first introduced in 2004. My first Nissan and I was 79 when I bought it. And I love it!
My daily driver is a older pro 4X titan and I will say I do love it. I won’t get rid of it until the wheels fall off even then I probably still would fix it just to keep it running great trucks!
Had a 2015 Silverado, rear main seal went out at 56,000 miles next day I traded it in on a F-150 with the small six....
I’m sorry to hear about your experience, but at least you got into a truck that has less problems!.
The core of this problem is CAFE and other environmental garbage. All that CARB hippie stuff needs to go the way of the dodo bird. Get rid of CARB. And the Epa too.
Get the Ecotech3 5.3 liter without DFM, which they manufacture without & you'll be just fine. The 10 speed transmission starting in mid 21 models are just fine as well. DFM disablers are also available to those who have early 21 models & below... just so simple to overcome...
Cylinder deactivation has been around for 25 yrs +/_ has never been perfected as not all drivers have the same driving habits . Its Much more involved than shutting off lifters. Basically it causes no oil to lifter and when it is supposed to restore that function it fails causing premature cam and lifter wear. Its a slow but steady death of an engine. Would you take your new Z28 Camaro to a dealer for a technician to change out parts not knowing if it was done right? This is a dilemma I would not risk as I believe that most dealers do not have trained skilled mechanics to tear down an engine that was factory assembled. This writing is a little dramatic as your car wont stall and cause an accident if you are aware that it is in trouble and needs service. I think if my vehicle that I may have ordered or waited to purchase had this issue I would want my money back!!
According to the NHTSA and many owners in the forums these do fail without notice or any signs. Many have failed at cruising speeds where the engine stalls out and doesn’t restart and that is a big safety concern.
I have friends that are GM techs they are capable of fixing the issue but when they are forced to use parts that are the same as the failed ones it just keeps happening.
I have a customer where this happened to them and the dealership techs rebuilt the engine with what they were required to by GM warranty. Then fast forward a few thousand miles later same thing happened then GM gave them a whole new engine complete drop in and guess what 1 year later it failed the same way.
These GM engines are similar designed to the engines that they were building years ago without the cylinder deactivation. I agree with you they haven’t perfected it. It’s not fair to put a technology in a vehicle that isn’t perfect that the consumer winds up paying the price for in the case of my customer, they dumped the truck after they got the engine warranty for the 3rd time and went and bought something else .
19 years. startws in 2006 and not earlier.
Wow I feel old I remember that year vividly 😂😂😂😂 time flys!
Do we still need to worry about lifter failure even if the lifters and cam have been replaced?
If it's the AFM/DFM lifter and cam it's possible it can still fail
I drive a 2006 Ford Escape 220,000 and counting ❤️
What Engine?
ewww
Just had this conversation with a friend. My buddy says his 2020 Yukon with 85K miles is burning 2 qts of oil at 3.5 K miles. He has been told this this normal.
That seems to be a norm that they are setting the standard to because of the problem but in no way shape or form is that normal direct injected engines do burn a little bit of oil but not 2 quarts in that amount of time typically about a quart every 5000 miles if that
The govt mandates a problem and then comes in and punishes when there is a problem.
Still love my 1998 Tahoe, but darn it, I need to replace the battery again.
The battery is cheaper than an engine lol!
NONONONO KEEP THESE ON THE ROAD GM FAILURES HAVE PUT 2 OF MY 3 CHILDREN PAST COLLEGE
As a fellow technician I agree lol 😂😂😂😂 but we should have to deal with other things breaking not the engines
PISS POUR PRODUCT IN ALL LINES I WILL KEEP A 96 ALL DAY
Those older ones are sweet. I have a 95 OBS pickup with the 5.7l that I run as a plow that truck has never let me down. They sure don’t make them like they used to. Just like the old slogan “like a rock” that was true for the older products.
This is why I delete the AFM on 5.3's. I put LS7 lifters in and a NON-AFM valley plate cover, also put in chromoly pushrods and rocker arm trunion kit.
That’s a great fix!
Gubmint going after gubmint motors
😂
Will this affect 2016 Tahoe 5.3L ?
So far they’re just looking into the 6.2 L although 5.3 L are also affected when it comes to the cylinder deactivation and the lifter failures
@@TheEnthusiastMechanic I know mine is effected. Do you think that if they do go to the 5.3 they would go back as far as 2016? I just spent $250 on a Range Tech' AFM Disable because I feel I need it.
This is what happens when the auto manufacturers stop building cars and trucks for the customer and are building for the government.
this is another reason why I’m keeping my barebones 2013 🇺🇸hd2500 gas 6.0 4x4 with 215,000 miles & still pulling strong 💪
Keep what you have , maintain well, and repair when needed
Sounds like a great truck you have there!
That's right, buy a FORD!!!!
I’m not saying Ford is any better but for the vehicle that I needed a Ford just happened to work out but it’s only gonna be around as long as the warranty is active I’d rather have a vehicle that has potential to have issues that aren’t catastrophic engine failures. I’ll deal with little stuff all day long, but I don’t wanna have it at the back of my mind that my engine might seized up while I’m driving.
I have a 2017 Tahoe LT and I STILL HAVE MY 2000 SUBURBAN! It has over 381k miles on it! Still runs good, still looks good.
07 Sierra with 351k miles. 4.8 under hood. No issues with engine. Some of hoses have needed replacement. Engine has been solid.
Glad yours is running great
I find if you stop buying junk you have fewer problems.
100% agree with you but sadly people don’t know and they buy them. I don’t think anyone goes out to buy a $80,000 truck knowing that it’s gonna have an engine failure. They buy them in good faith and standing, assuming they’re gonna be great and then they have short falls like this.
@@TheEnthusiastMechanic Most of them are leased, nobody with $80K is that stupid.
Glad I went outside for a 🚬 break. Picked the 5.3 after that & imo it’s good enough on a 1500.
the L83, L84, and L86 have the same AFM/DFM system. The difference with the L87 is it has a variable volume oil pump. they flow less oil to save mileage.
The 5.3 has variable pump also. I know, I have performed the delete on a L83, I replaced the oil pump and it was a variable one.