BREAKING: GM is officially recalling the L87

[jfoj]

It has to do with the engine build date window. GM seems to have indicated they have determined a engine build date window of affected engines. So this does not include all 2021 or all 2024 vehicles. But will likely include all 2022-2023 vehicles.

For example, at least for the moment, my 2024 Yukon is not included in the Recall because my engine was built July 15, 2024. Initial engines included in the Recall were with engine build dates before June 1, 2024, then GM moved the date to builds before July 1, 2024.

I do not know the 2021 engine build cut date, but I am sure the window is or will be published at some point.

 

[Scarey]

They can have phase dates all they want but its parts they wont have

I think it’s interesting that the date they use in the recall information bounces between engine manufacture date and vin manufacture date. Pick one gm. Every time gm opens its mouth they lose credibility.

 

[Vladimir2306]

I advise everyone to open the engine pan, and see the condition of the connecting rod liners. If they are the same as in my photos, already worn out, then change them to red ones from the 6.2 4th generation. They fit more tightly, have less gap, and resist oil starvation more.
Playing with oil, DFM, and modes will most likely lead to nothing.

 

[Scarey]

June 1 based on vin, July 1 based on engine manufacture.

 

[Scarey]

I advise everyone to open the engine pan, and see the condition of the connecting rod liners. If they are the same as in my photos, already worn out, then change them to red ones from the 6.2 4th generation. They fit more tightly, have less gap, and resist oil starvation more.
Playing with oil, DFM, and modes will most likely lead to nothing.

Every engine ever manufactured will eventually fail. I think “playing” with oil, Dfm, and modes can make a difference. Until gm comes up with a real fix, nothing to lose.

 

[WalleyeMikeIII]

Any ideas why a particular 2021-2024 Yukon Denali with the 6.2 isn't found in the GMC database? I thought it covered all 21-24s. I'm searching here: https://www.gmc.com/ownercenter/recalls

Thanks.

Only the ones in the affected manufacturing window. If your VIN isn’t on the list, that’s a good thing.

 

[jfoj]

I think it’s interesting that the date they use in the recall information bounces between engine manufacture date and vin manufacture date. Pick one gm. Every time gm opens its mouth they lose credibility.

The issue is you as the owner can only determine the Build Month and Year of the vehicle based on the door tag or a more advances online VIN decoder, not the actual vehicle build day/date. GM has this information based on VIN, but I am not even sure dealers have immediate access to this.

Engine build dates are probably 2-4 weeks earlier than the vehicle build date, the engine build date is what is important with this Recall as GM seems to think they have clearly identified the build date window of problematic engines.

 

[jfoj]

June 1 based on vin, July 1 based on engine manufacture.

More likely some late July vehicle build dates are safe and probably most of the Aug/Sept 2024 vehicle build dates are safe.

Again, my vehicle is a 8/2024 build, but I have verified the engine build date is July, 15, 2024 based on the build tag on the rear of the drivers side cylinder head. At least for now, I am safe by 2 weeks, but we will see if GM moves the goal posts again.

I believe GM knew there were problems as far back as 2022 and even in 2023 and were grasping at straws. There were 2 GM Customer Service Campaigns, one is 2022 for loose main bearing bolt torque in a specific VIN window and then another on in 2023 for oversize lifter bores in the engine. I think GM may have missed the bigger picture and focused on these events and thought they had found the problem. Then in 2023-2024 it seems the problems became worse, or at least this appears that the 2023-2024 models had earlier failures and even replacement engines were failing at low mileage.

 

[WalleyeMikeIII]

The issue is you as the owner can only determine the Build Month and Year of the vehicle based on the door tag or a more advances online VIN decoder, not the actual vehicle build day/date. GM has this information based on VIN, but I am not even sure dealers have immediate access to this.

Engine build dates are probably 2-4 weeks earlier than the vehicle build date, the engine build date is what is important with this Recall as GM seems to think they have clearly identified the build date window of problematic engines.

Customers can actually inspect the engine build date, just reqires looking for it on the block...but the "engine build window" of known bad parts is a bit unknown...We seem to know the bad window end is 2024 day 183...we don't know the begin.

 

[WalleyeMikeIII]

I advise everyone to open the engine pan, and see the condition of the connecting rod liners. If they are the same as in my photos, already worn out, then change them to red ones from the 6.2 4th generation. They fit more tightly, have less gap, and resist oil starvation more.
Playing with oil, DFM, and modes will most likely lead to nothing.

While this may be really good advice for engine longevity; for anyone still in the recall and under GM powertrain warranty, this is probably poor advice. It will give GM an opportunity to deny a warranty claim as this wold be an unsanctioned modification.