I've had my 2021 Yukon Denali with the same engine for a little less than two years now and it has performed perfectly. I haven't had a single problem. I have grown nervous though because I am aware of the problems with this cylinder deactivating engine. I don't know how widespread the problem is, but I guess that doesn't matter when it happens to you. A class action lawsuit has been filed over this.
I have done a little research myself over this. The problem is collapsed lifters. This can lead to bent push rods, damaged cam shafts and possibly broken valve springs. What you can expect is GM will repair or replace that engine. The problem is that if the engine is replaced, it will be replaced with an identical engine having the same questionable lifters and the same potential problems. If they repair the engine, same thing. The lifters will be replaced with the same identical parts. So far as I know, there is no corrective action on GM's part to solve this problem, no redesigned or improved lifter. There are stories of people having their engine overhauled more than once. I'm hoping for the best but keeping my ears open for the clanking of a collapsed lifter. If it happens to me, I will have it repaired under warranty and keep the vehicle. I love driving it.
I am amazed that there are aftermarket conversion kits available called "AFM/DFM Delete Kits". These kits contain all the parts necessary to eliminate the Dynamic Fuel Management System (cylinder deactivation) and convert the engine to a standard full time V8 engine. To do this requires conventional lifters, new push rods, new camshaft, new oil pump and a few other parts. I'm sure the dealer won't do the work and I suppose it would void the warranty. You would have to find your own automotive garage to do the work and pay for it yourself. It costs around $5k. The kit with the parts around $600. This might be a good option once the GM warranty runs out. I wish GM would give us this option, even if we have to pay the additional cost.
In my opinion, when people have repairs on a new low mileage engine like this due to a widespread problem or defect, GM should grant an extended engine warranty for 150,000 miles. At least for this specific issue. Maybe this will happen due to the class action lawsuit. I wish you well.

 

Thanks for great information Gary. If I do have the pushrod problem I will most likely seek a buyback of the vehicle. Still waiting to hear back from the dealer.

 

Please keep me and the readers informed on how you make out. I would be very interested to know how the dealership and GM treats you. Have you been provided a loaner car?

 

Quick update. The dealer says it’s a bad fuel injector which is on back order and not available. I don’t think it’s just that given all the warnings. Not sure what to do at this point. Also they said they no loaner cars available right now.

 

GM should reimburse you for a rental car. It seems to me that any good dealership would assist you here. Also, you might request they replace your vehicle if they can't get the parts in a timely manner, considering the very short time you had it.

 

Please keep me and the readers informed on how you make out. I would be very interested to know how the dealership and GM treats you. Have you been provided a loaner car?

I have a 2023 Yukon cl Denali I have 1800 miles on it the engine went the put another engine in after 2 months and that went what I’m I to do they gave me a loner that does not meet my suv and gmc is giving me the run around

I took delivery of a brand new 2022 Yukon XL Denali on 8/11/22. Exactly two weeks later the dealer had to pick it up with a flat bed due to multiple system warnings including check engine light and running rough with engine noises. I still have not received any news whatsoever from the dealer. Frankly I’m shocked and getting pretty angry. It was assembled in 7/22 and had less than 10 miles when I drove it off the lot. 6.2L engine. Anyone have a similar situation? Could this still be the pushrod issue? I’m thinking I may just demand a full and complete refund. Any insight would be greatly appreciated. Thank you.

i have a 2022 Yukon cl Denali my engine went at 1800 miles the stuck a new engine in it after 2 months they had it and that engine went

 

I have a 2023 Yukon cl Denali I have 1800 miles on it the engine went the put another engine in after 2 months and that went what I’m I to do they gave me a loner that does not meet my suv and gmc is giving me the run around i have a 2022 Yukon cl Denali my engine went at 1800 miles the stuck a new engine in it after 2 months they had it and that engine went

Ooohh, I'd be livid with this and all the other problems these new Yukon/Tahoe owners are dealing with after spending close to $100k for a vehicle! I have a 2004 Yukon Denali currently and have had a 1998 and a 2002. My car just leaks as mentioned in other posts but all this is making me rethink my want of buying a new Yukon! I have a 6.2 Denali, GMC should stop being so arrogant, admit they made mistake by using the new 6.2 and fix their problems! First one they should do is stop using the engine they're using. And their lack of customer service and enthusiasm for helping their customers is appalling!

 

I would let the dealer keep the vehicle and demand a buyback.

 

No problems. 21 6.2. Break in procedure for the first 1500. miles. 93 octane fuel used aways. Runs strong!

 

BTW I bought a 21 C8 at the same time. Some c8 have had the lifter problems. Seems some bad ones got into some of the 6.2.

 

I have a 2023 Yukon XL Denali. Took possession in Nov'22. In Dec'22 the vehicle would randomly shut off while driving. Then in Jan'23 the engine started chirping and knocking at 1,080 miles. The oil was full of metal. It's now at the dealer getting torn down. GM is fighting replacing the vehicle. Thank gosh my state has fairly solid lemon law statutes.

 

What resolution did they provide you with ?

 

2022 Yukon XL Denali with 6.2 Engine cut off at speed on highway. 18,000 miles. GM is replacing engine, expected turn around 30 days. Dealer says GM will review what happened to the engine but did not say if we will find out. We have filed a complaint with GM Canada and they said they will only tell us what they can "offer" us for our loyalty after the repair is complete.

 

2022 Yukon Denali XL purchased in June of 2022. Died twice on the side of the road in January and February 2023. Whole new engine replacement needed as I am told it was the crank. They did give me a nice loaner and are trying to go above and beyond but my car has 11k miles on it. For the price should definitely not have to worry your car is going to die on the side of the road! I’m sure there will be a class action lawsuit soon

 

Update: the car ended up back at the dealer for a bad fuel injector. I had it. The problem appears to be the 6.2. Got a new 23 Yukon Denali diesel 3.0. Runs like a charm. Super fuel efficient.

 

2022 Yukon Denali with 20,000 miles. Car started throwing itself in neutral at stops. Towed to dealer where engine seized during testing. They want to replace entire engine. I will be demanding a buy-back.

 

Did they buy it back? I have had two engines fail back to back.

 

2022 Yukon Denali with 11,000 miles. I've put 4 quarts of oil in so far and there is no evidence of leaks. Dealer put neon dye in the oil and suggested that I crawl under the car with a black light at some point to see if I see leaks. Um, WTF. This is a lease and I am seriously thinking about paying a penalty to turn it back in and buy something else. Egads.

 

2022 Yukon Xl Denali ordered and picked up in august. Has 8’900 miles now. Bad lifters and dealer found metal shavings in the engine. Gm to replace motor. Motor came in in about 3 weeks but waiting on a few more parts to start install. Wanting to use the Range Afm/dfm disabler but manufacturer said not sure it will work on the 2022 Yukon. I will update again after fix.

 

2022 Yukon Denali XL with 16,000 miles. Engine failed last week. They are replacing the engine now (rebuilt). Service tech told me I would get a 3 year 100,000 mile warranty on the remanufactured engine. Have any of you had any luck getting a buy-back?

 

I ordered a 23 Denali. Took it off the lot in February. By August Engine died and needed a replacement. Fast forward 2 months and I just picked it up this morning. I didn't drive it two miles before complete Engine failure again....in a brand new engine. Two new engines in less than a year. Terrible customer service. They have offered a brand new vehicle, but I want nothing to do wth GM ever again

 

What was the outcome when it happened twice did gm buy the vehicle back??

 

All the 6.2 are having problem here in NYC for the limo business.,, was in the dealer yesterday and saw about 15 been replaced., whats worse is that the wait is 3 month minimum., mine died just driving ., it turn off while rolling. Now im stuck with a new cars and the payment has to be pay., as soon as this is fix am trading this crap., thank God I bought an extended warranty., for the must part the engine dont last more than 68k miles.

 

Our 22 Yukon Denali with just over 30k miles died while driving on the interstate. Engine failure. The dealership said it was the main bearing or rod bearing inside the motor and won’t know more until it’s pulled out. GM is replacing the motor and we’re told we should have our car back within a week or so. Very disappointing.

 

My 2023 Yukon Denali died in February on a trip when i was 200 miles from home. Diagnosed as spun bearings and needed a new engine. The car was 5 months old and had 11,000 miles. The "service advisor" at GM corporate assigned to my case was completely useless. Car is back now after being out of service for 28 days. I have a lawyer that filed a lemon law case and am waiting to see what happens.

 

UPDATE

The lawyer sued GM and I got 20K for my trouble and a separate award to cover legal fees. The car runs OK but I don't trust it anymore and will likely get rid of it 10 miles before the powertrain warranty expires...

 

Same thing happened to mine. Bought in November of 2023 now the engine needs to be replaced. Dealer states there was metal shavings. GMC clearly knows this is an issue. Customer Service is also not willing to make this right. Wish I would of known all this prior to buying a 100,000 car that isn’t worth that

 

After unepected total engine failure while driving last week , our brand new SUV (2023 yukon denali ultimate) had to be towed back to the dealer with less than 5,000 miles on it and is now awaiting a new engine after metal shavings were found in oil pan !!!!! Unbelievable this is a known issue and yet GM remains silent!!!!!!!!!!!

 

What resolution were you provided ? Any insight would be helpful as I am on the same boat

 

Going through the same thing, dealership replaced both banks of lifters, mechanic took on test drive and bottom of the engine is now making noise and metal shavings in the oil, so now I need a new engine , I’m 1000 miles from home with a family of 5 and basically screwed. Filed complaint with GM three days ago and have yet to hear from them, the dealership is being very helpful but there’s only so much they can do, GM should be compensating anyone that has these engines, they know they are bad and the keep putting them in these vehicles, and the consumer is getting screwed.

 

Joining the group of frustrated 6.2 GMC Yukon owners. Purchased my 2022 GMC AT4 Yukon used with 9,000 miles. GM Certified Pre-Owned. Now at 41,000 miles the engine locked up and had to be towed to the nearest dealership which is 45 minutes from my hometown. The engine has to be replaced and they are trying to locate a new one. Dealership is only offering me tiny Buick Encore as a loaner, which doesn't work for my family. Opened a ticket with GM and they said they can not help me. That I can get a loaner and keep my receipts and submit them for review to see if they would pay for it. NOT HAPPY...
Any help would be appreciated.

 

My 2022 yukon denali with ~26k miles stalled / died on highway a few days ago. I was over 100 miles from home and shortly after pulling off to shoulder, the car became unresponsive (wouldn’t turn over with multiple error messages popping on dash). Biggest immediate issue was that I couldn’t shift it into neutral for multiple towing companies that came out (“conditions not met to shift” message). The battery was also showing very low voltage minutes after pulling off and initially thought it could all be alternator related (also tried jumpstarting). Finally was able to get a tow truck with dollies out after over 11 hours on side of the highway (most of which was in 100 degree heat). Still waiting to hear back from GMC dealership… trying to be patient but already thinking about options (lemon law suit, buyback, etc). Very upsetting to read through so many people’s similar experiences and I hope GMC figures this out.

 

My new 2024 GMC Yukon xl Denali just did the identical thing last night. stuck on side of road for 5 hours waiting for a tow to the dealership which was closed. . Can you tell me if your dealership was able o fix the issue or not? if so what was it?
less than 4000 mile on mine.