2023 GMC Yukon AT4 6.2L dead at 10K miles

[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.