It's the same engine and transmission as the previous generation ...
2021 Yukon Denali---POS
- Thread starter Donny87
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It's the same engine and transmission as the previous generation ...
TollKeeper
Full Access Member
Actually, it kinda isn't. Remember, GM says they were going to make trucks without the AFM/DOD because of the chip shortage. There might be conflict of parts in assembly, resulting in AFM DOD parts being used when the shouldn't, or AFM DOD ECM being used when they shouldn't.
Fireman591
Full Access Member
I feel your pain. Mine has been out of service a total of 33 days for fuel delivery issues. I have a build date that is in the danger zone of the bad valve springs and lifters. We have been in lemon law litigation with GM since January. I am hoping for a fair settlement so we can bail on this POS. Pretty sad when you spend 65k on a vehicle and wonder when it is going to strand you due to ****** quality control from GM and their suppliers. I have had a Honda Pilot for close to 9 years. It has close to 80,000 on the odometer and the only time it has been to the dealership was for an airbag recall. I guess I'll stick to Lexus, Honda. Acura and Toyota for my next vehicles. They are much more reliable. GM's quality sucks these days 
Ajmalian
Member
I miss the days when a new model car/truck came out and lasted at least 4-5 years before a mid-cycle refresh took place or perhaps on completion of 5-6 years a whole new model was introduced. Now you buy a new car….you have issues that was anticipated in its first year…if you waited and bought in the second year…BOOM!! GM hits you with a mid cycle refresh in the 3rd year…so u feel you’ve missed out on that. If you waited for the 3rd year model and realize that it for whatever odd reason is a screw up and wished you had the 2nd year model….the vicious cycle just never and ends and before you know it, there’s a whole new “Better model” and your stuck with a lemon from year 1 or 3 or with an outdated model from year 2. Things were great and consistent until 2014…it’s just been downhill since then. I got my 2021 Denali in Feb this year and even though I haven’t had any serious issues, I’m already regretting it with all the rumors of a new digital display coming for the driver centre and potentially paddle shifters too.
It’s all very annoying GM. Not very happy!!
It’s all very annoying GM. Not very happy!!
Ajmalian
Member
Sadly the wisest thing TO DO is to go for the last model year before the new shape is released…but here in Dubai, typically the prices go up from the time a new model is released. So knowing that I am paying more now than I could have paid 5/6 years ago for a car that will in the very next year or in a few months be dubbed “outdated” or “the old shape” just gets on my nerves. So frustrating!!
Quark
Full Access Member
Going by the past model 2025 should be safe to buy one of these. Funny how they get it right through incremental improvements thereby boosting confidence before crapping out another bomb.
+1 on 2000-2006 best model made.
I was looking at trucks and my local mechanic said to get a 1999-2006 Chevy truck as they had the least issues. I am sure it is beyond frustrating on the issues being the car is 2021model. The advancements on technology is great. Imo, i have no faith in the electric computer/components after 8 years. It is not just Chevy, Ford is plagued with issues with their transmissions and engines.
I was looking at trucks and my local mechanic said to get a 1999-2006 Chevy truck as they had the least issues. I am sure it is beyond frustrating on the issues being the car is 2021model. The advancements on technology is great. Imo, i have no faith in the electric computer/components after 8 years. It is not just Chevy, Ford is plagued with issues with their transmissions and engines.
Jeff Mills
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Denali Mike 2016
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Agree 100 percent. New GM stuff is average at best. My 02 burb has 342k and runs like new
sfc_jones
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I wish GM would can the AFT/DOD crap. I removed that stuff and installed DOD delete on my 2007 Tahoe and will do it on my 2010 Suburban pretty soon.
Sounds like a good case for the Lemon Law.
Neither of you are accurate, actually. The 21's have an entirely different valvetrain and electronics in the motor - Dynamic Fuel Management system that has replaced the Active Fuel Management system. (This is where the new lifters come in) --but the Silverado/Sierra that are being with the Dynamic Fuel Management disabled are only having it disabled electronically. (essentially just locked into fulltime V8 mode, but all of the mechanicals are identical. The lifter issue has been linked to bad parts from a supplier, which is supposed to have been remedied by the end of April. (Believe the build issues with the lifters date to mid December 20).
To the OP: Man you are having no luck whatsoever, and it sucks. ... but if you have a different dealer, even if it's Chevy or Cadillac, you may want to check those out. Issues with the Navigation and SD card have been well documented, and the large majority, if not all of the issues have been resolved by replacing the SD Card reader/slot. - that having been missed says to me that the dealer is not up to par.
My experience has been that the first year of a new platform is very buggy. I have 2015 which was first year of the previous model update. 2016 - 2020 were better. My 2014 was great.
DFM has been used since 2019 ...
https://gmauthority.com/blog/gm/gen...-management-cylinder-deactivation-technology/
Your date for December is also wrong, mine was built in Feb 2021.
Thanks for trying.
Previous generation was AFM, not DFM. DFM was used on GM pickups and likely same/very similar in the '21 SUV's, but it is going in a lot more vehicles now.
I believe he was saying the problem time frame for lifters was 12/20 - 4/21, which would include 2/21. All seems correct to me.
You are welcome.
Bill Barnes
Member
I bought my 2005 Yukon XL SLT new from Manassas VA dealer. It has a Southern Comfort conversion done before it was sent the.dealer. I'm at 203K miles. The only serious problem I've had was the trans going out at 82K. Otherwise it's been mostly wear items that needed replacement. I don't have any rust, mostly because after any snow event, I immediately go to my favorite car wash and have the undercarriage wash and rust inhibitor treatment done during the wash. I love my Yukon!
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