2023 GMC Yukon AT4 6.2L dead at 10K miles

[tj40371]

I was at delaer yesterday, asked my salesman what their fail rate they have seen on the 6.2.

He said the dealer as seen two of them in last 3 years, out of about 300 trucks. One was a Sierra, one was a Yukon. Both were top end/lifters.
His opinion from what they have seen and in talking to field rep and other dealers, is it is about a 1% problem. Which he said is "within the normal production expectations of GM"

My dealer service department said the same (and they are a very high volume dealer). The forums seem very scary about these 6.2L engines but they sell how many of these a year vs. how many reports we see on this forum?

I'm up to 14k miles on our 2023 and expect to run it up to about 75-100k before potentially looking at a replacement.

 

[Dangler6131]

My replaced engine should be finished today. Will report back. GM not offering a buy back.

 

[Geotrash]

My replaced engine should be finished today. Will report back. GM not offering a buy back.

That's great - less than 16 days from tow to new engine. Bummer about the no buyback, but doubt you'll have another failure for as long as you own it.

 

[Marky Dissod]

My replaced engine should be finished today. Will report back. GM not offering a buy back.

What, if anything, IS GM offering? Does this replacement engine come with any warranty?

 

[WalleyeMikeIII]

What, if anything, IS GM offering? Does this replacement engine come with any warranty?

Of course it come with the remainder of the 5 year, 60k mile warranty.

 

[tom3]

I wonder if this a new engine, a long block, or a rebuild? Sure a shame to do a heart transplant on a brand new premium machine.

 

[Dangler6131]

What, if anything, IS GM offering? Does this replacement engine come with any warranty?

Nothing yet.

 

[Dangler6131]

Here is another question - is an exhaust smell normal with a new replacement engine? When it idles it smells like an old car

 

[Dangler6131]

I wonder if this a new engine, a long block, or a rebuild? Sure a shame to do a heart transplant on a brand new premium machine.

Unsure. Here is what work order said

 

[Dangler6131]

The fun continues

 

[StephenPT]

Here is another question - is an exhaust smell normal with a new replacement engine? When it idles it smells like an old car

Lots of oils and greases are on the outside surfaces of a new engine. It takes a few hundred miles for it all to burn off.

 

[tom3]

That work order is pretty confusing, various engine parts but repair description for an electrical problem?

 

[Dangler6131]

Lots of oils and greases are on the outside surfaces of a new engine. It takes a few hundred miles for it all to burn off.

This is fairly noxious. Will give you a headache bad. Taking it back to dealer Monday. I cannot overstate how unhelpful GM has been on this whole affair. I have bought seven vehicles from them in the last 12 years and the most they have offered is an extended warranty on my replacement engine.

 

[Dangler6131]

That work order is pretty confusing, various engine parts but repair description for an electrical problem?

“Catastrophic engine failure”

 

[Blackcar]

Of course it come with the remainder of the 5 year, 60k mile warranty.

How every long you didn't have use of vehicle do to being repaired at dealer extends the 5 year warranty.

 

[stevedonato]

Gov't standards are one thing - the tests are anachronistic, and do not come close enough to represent real world driving.
CAFE MpG tests explain undergeared axles for decades, followed by smaller engines with less cylinders mated to 8- & 10- speed transmissions.

That said, my suspicion is GM went ahead with V8-V7-V6-V5-V4-V3-V2 mode because they don't want the engine to last TOO long.
That extra complexity is gonna bite them in the arse when Mexico's used car market hemorrhages into the southwestern US.

GM tried this in the early 70's at least with the Oldsmobile. It never workedr and dealers would make the change to disable it and keeping it running on all 8 cyls. Remember at this same time GM produced Gas V8's running on Diesel fuel another disaster that never worked. Time for GM to learn from japan.

 

[stevedonato]

Thanks for the mansplain. I long ago gave up trying to guess every presumption someone might make to one of my posts and trying to account for it up front. Yes, of course I understand WHY AFM/DoD exists. What I'm trying to convey is that it doesn't actually result in a meaningful benefit in the real world. Ergo, the regulators are forcing this down our throats and it's a farce.

Do you think a customer cars about saving a few bucks when buying a $85K GMC Denali?

 

[B-train]

This is fairly noxious. Will give you a headache bad. Taking it back to dealer Monday. I cannot overstate how unhelpful GM has been on this whole affair. I have bought seven vehicles from them in the last 12 years and the most they have offered is an extended warranty on my replacement engine.

If it smells like an old car with no cats, then I would assume the flex and ball section of the Y pipe isn't sealing properly. You could scoot under and look for soot trails at the connection point. The only spot you should find soot is on the tailpipe.

 

[Geotrash]

Do you think a customer cars about saving a few bucks when buying a $85K GMC Denali?

My point, precisely.