BREAKING: GM is officially recalling the L87

[KMeloney]

Mine is on the list. Got the notice in the app.

Has anyone taken his truck in for this “inspection” yet? (I’m assuming it’s too soon after the notice.) Looking forward to hearing what transpired.

 

[Marky Dissod]

Also asked two other questions which got ignored
(not getting any answers from Western Europe - kinda makes sense, was never able to post on this forum from Poland or Turkiye)

What is the motor oil spec for Corvettes with LT1, LT2, LT4, LT5?
What is the motor oil spec for L8T equipped vehicles?
(forgot to specify, inside and outside the USA, since I'd not be surprised by a double standard)

 

[KMeloney]

Also asked two other questions which got ignored
(not getting any answers from Western Europe - kinda makes sense, was never able to post on this forum from Poland or Turkiye)

I’ve got an ‘01 Z06 that calls for 5w-30 Mobile 1.

 

[Marky Dissod]

I’ve got an ‘01 Z06 that calls for 5W30 Mobil1.

Respect to the LS6 ... but a '21 Z06's oil spec is more pertinent here.
(and by now, I'd be using 5W40 for an LS6 in the summer, 0W30 in the winter - again, not pertinent to the last 5 years ...)

 

[DunzoDenali]

Yes this is the band-aid up to 2024, whatever damage the engine has suffered from 0W-20 is there to stay. I think it would be safe to say that anyone that has a 2021-2024 6.2L is well advised to pay attention to this recall and determine what they want to do next.

This is specific to the 6.2.... so I'm not commenting on other engines like the diesels or the 5.3. Shoot, I don't plan to change what I am using on our 2024 5.3, will continue to use 0W-20 until GM makes a recommendation otherwise.

As far as 2025 goes, I would guess they have applied the actual fix on their end, we don't know what that was yet. To be honest, and from personal experience, these corporations are quite dumb when it comes to doing the right thing so I wouldn't be surprised if nothing has changed in the 2025 year model but they haven't made the recommendations yet from internal politics (fleet avg economy, etc).... I have worked in several in engineering functions, and one shouldn’t be surprised how poorly they communicate within the company, and how much the 9-5 employees care to do anymore, or afraid to do the right thing. A whistleblower is nice to have from time to time.....

Being pretty far along in the failure process pre-recall, I am left with a lot of questions. For one - I’ve had a total engine replacement in 2025 rod (bearing failure in original engine) and the replacement engine failed in approximately 10 miles (I’ve been told camshaft components). Now the replacement engine (which clearly was also faulty) is under recall.

So what exactly do they plan to replace failing engines with? More failing engines?

 

[jfoj]

But,

this logic is OK, but still does not explain leaving 2020 off the recall. The defect is the engine…same thing in the trucks as the SUV…maybe there was not a foreign bearing supplier in 2020.

NHTSA bases most of their investigations on "Reported Problems/Failures". My guess is with the 2020 models, especially the pickups did not have the failure rate of the SUV's based on the lighter weight, how they are used and that many of the pickups were possibly "Company/Fleet" vehicles that either had better maintenance, higher miles and out of Warranty and someone did not take the time to report failures.

Like anything if there are not reports/complaints filed about failures to the NHTSA they are oblivious to what is going on in the world. They unfortunately cannot open investigations up based on Social Media and Forum posts.

 

[jfoj]

There is no basis for this on the Duramax. Have seen many Oil Analysis of 5-7k oil that shows no fuel dilution to speak of.... plenty of lubricating/TBN properties left, and changing prior to 5k is just wasting good oil. Have not heard, nor read, about any/many oil related failures of a 3.0 with many many well over 100k at this time. Mine doesn't burn a drop and is right on the full mark day one after an oil change and day 131 after an oil change. Do I Like 0w-20? Not really..... am I going to keep using it? Absolutely thru 6/100.
Bottom line... Different beast and nowhere near the same issues.....

I have it on some very good authority that any Duramax running 0W20 is not ideal. While you may have had good luck, I have heard otherwise. Choose to do what you want to do, I am just putting info out here for people to consider. Again, with any of these vehicles a lot comes down to how the vehicle is driven. Give the Mom/Housewife a Diesel SUV to run kids back and forth to school and events 3-5 miles round trip, nothing good will come from it.

I have changed the oil in my 6.2l 3 times in 6k miles. There are reasons, I will likely settle on 3500-4000 miles, but I want to see where the 50% OLM indicator show up as well. The needle bearings in the lifters are the real weak point long term.

 

[jfoj]

Then why does 5.3 on 0-20 oil drive without problems, and 6.2 wears out the connecting rod liners

The 5.3l is not put under the stress the 6.2l is by the TCM causing very high Torque loading up to 100% at 1500-1700 when cruising on the highway pulling slight to medium grades. I have not towed with my truck yet or put the vehicle in Tow mode and monitored the Torque loading yet, but I assume in Tow mode the TCM will use more engine RPM overall, i.e. downshift more frequently and into lower gears to use RPM to its advantage.

 

[jfoj]

This thread has been a great read! Back in November 2024 I took our 2022 Denali in for an oil change at 19,500 miles. At that time I had read a lot here about oil viscosity and asked the Dealer for something heavier that the 0-20. They said no dice, that the 0-20 was what the factory called for if I wanted to keep my warranty. But, interesting at the time was that they added a "BGMOA oil conditioner" for $24.95. I'm wondering now if it was a suggestion from GM to the Dealers for a way to maybe head off what they already knew was coming?

A recall decision like this from a large organization does not happen overnight and does not happen without A LOT of discussion and A LOT of data to justify the expense. Having Dealers add an "oil conditioner" might be something I would argue for if I was in one of those meetings. Just saying.

BGMOA is ONLY a PROFIT center for the Service Department, they are not worried about protecting your engine. GM suggests NO oil additives.

 

[DunzoDenali]

If anyone on here has received a component coverage letter for related engine replacement/repairs, I’d appreciate details on 1. when, and 2. Was it transferable or non-transferable.

Feel free to message privately if preferred