BREAKING: GM is officially recalling the L87

[OR VietVet]

Interesting read, if true GM is developing " diagnostic tools" to test for bearing damage.

Possibly something like the vacuum system another manufacturer developed and used.

Special Diagnostic Tools

The special inspection tool is a scanner and if a P0016 comes up then the oil change process happens and a 0W-40 oil cap is installed.

 

[KMeloney]

The special inspection tool is a scanner and if a P0016 comes up then the oil change process happens and a 0W-40 oil cap is installed.

It appears that the oil change happens if the code DOESN'T come up, and the engine gets replaced if it DOES. (Even then, it doesn't sound as though the code not coming up excludes you from an engine replacement.)

IFF an L87 built within the suspect timeframe
fails before it accrues too many miles,
or
fails before too much time has elapsed,
or
throws code P0016
GM owes you either a repaired or replaced L87.

How many are "too many miles," and how much is "too much time"?

 

[the 18th letter]

I wonder what’s failed more? The 6l80e transmission or the 6.2l engine.

 

[OR VietVet]

It appears that the oil change happens if the code DOESN'T come up, and the engine gets replaced if it DOES. (Even then, it doesn't sound as though the code not coming up excludes you from an engine replacement.)

How many are "too many miles," and how much is "too much time"?

Exactly what I meant to say and typed wrong. Thanks for catching.

 

[jfoj]

The 10l80/10!90/10l1000 valve bodies are failing at a high rate. I expect the 2024/2025 are likely to recalled in the near future.

 

[Marky Dissod]

IFF an L87 built within the suspect timeframe
fails before it accrues too many miles,
or
fails before too much time has elapsed,
or
throws code P0016
GM owes you either a repaired or replaced L87.

How many are "too many miles," and how much is "too much time"?

Sorry, sometimes I suck at number memory (it's why my alignment specs are 'MAX Caster. No +Camber, slight -Camber. No Toe OUT, slight Toe IN.)
GM recently revised the warranty for suspect L87s, extending both time and mileage under warranty.
The revised duration and mileage -
TEN Years or One Hundred Fifty THOUSAND miles, whichever comes FIRST (if not mistaken)-
answer your questions.

If you don't how the Magnusson-Moss warranty act works, you're far more likely to defend GM,
and skrewer yself out of a repaired or replaced L87.
Y'all have an opportunity here - don't squander it.

Sometimes the right thing to do is the right thing to do even if you fail, so I'll try again:
GM built tens of (if not hundreds of) thousands of subpar L87s.
Despite that the LT1 & the L87 are nearly identical, GM tried to build the L87s so cheaply,
that 0W20 is no longer sufficient protection.

Those of you included inside the parameters of the recall - those with L87s built subpar -
have 10 years or 150,000 miles to suss out how to get GM to repair/rebuild or replace your L87s.

 

[BacDoc]

IFF an L87 built within the suspect timeframe
fails before it accrues too many miles,
or
fails before too much time has elapsed,
or
throws code P0016
GM owes you either a repaired or replaced L87.

If you don't how the Magnusson-Moss warranty act works, you're far more likely to defend GM,
and skrewer yself out of a repaired or replaced L87.
Y'all have an opportunity here - don't squander it.

I know exactly what you are saying bro! Definitely good advice for those who can read between the lines!

 

[rmsnickers]

For those of you advising on changing oil at 50% of OLM, is this mileage based or time based? I had an oil change at 1 year because my OLM said I was at 0% yet my mileage was only 2,697. Asked another way, is time a concern with oil quality or is it mileage that dilutes it over time?

 

[NoYukonYet_1Jeep]

I think your idea of the unfortunate outcome of this mess is very close to reality.
I worked for 42 years in an automotive assembly plant in different departments all over the plant. Your words bring back memories of things that happen from either laziness or the pressure of “ make production goal”.
Its always the customer that pays the price.
I had three 6. 2 engines failed and it was a terrible experience.

Three?!? I second guessed myself .. but was talking to my BIL - if my Yukon is on the engine replace list, it’ll be my fourth 6.2L in a 2023 Yukon (over 2 vehicles, both 2023) . Insane. Feel like I should be up for some type of award. Anyone out there going on a 5th motor?!?

 

[cornicekurt]

I like your logic. It would be some reassurance that GM is trying to do the right thing.

Agreed

 

[cornicekurt]

Three?!? I second guessed myself .. but was talking to my BIL - if my Yukon is on the engine replace list, it’ll be my fourth 6.2L in a 2023 Yukon (over 2 vehicles, both 2023) . Insane. Feel like I should be up for some type of award. Anyone out there going on a 5th motor?!?

GOOD GRIEF!!

 

[cornicekurt]

I don't have a dog in this fight but I do have a question for the guys who do. Are you feeling lucky?

A thicker oil although it should protect better will NOT fix a manufacturing (part) defect. So my opinion is switching to 0w40 just prolongs it until the catastrophe happens. Whether that's an extra 5 miles or 50k.

I wish you all with 6.2s the best of luck! I know I'd be pissed with an expensive paperweight with low miles on it.

Unbelievable. Finally grow up enough to buy a new luxury car and they tell me to bring it in for heavier oil because some have come apart!! Sounds like the days of shady mechanics tossing sawdust in the oil to silence the knock! I’m sick to my stomach

 

[cornicekurt]

That would be a giant $3B sting at least

I would love to get my hands on the internal "8D report" on this issue

Triple that number. For simple math purposes let’s say it a million cars. Minimum 10k per (probably a lot more)
That’s TEN BILLION!

 

[viven44]

Triple that number. For simple math purposes let’s say it a million cars. Minimum 10k per (probably a lot more)
That’s TEN BILLION!

That makes the $5B Tariff hit GM complained about look like a good deal.. incidentally, looks like that "defective" Crankshaft was made "not here" based on the supplier report shared earlier.. ouch.. must be hurting now

I'd be interested to find who makes the Corvette crankshaft (part#12705121) which is a different part number but essentially the same thing. The differences are likely attributed to the different transmissions used (Corvette 8-speed has no flexplate, etc, etc,)..

Update: plot thickens

No actually I was partly wrong... likely not related to the transmissions

In fact when I pulled up the defective part # 12710954 (per RockAuto) on GM parts outlet it comes up with an updated part number and also shows some Corvettes use the same part if this is true (to be confirmed.. maybe call a dealer and get the part #s) why aren't they involved in the recall

 

[vcode]

For those of you advising on changing oil at 50% of OLM, is this mileage based or time based? I had an oil change at 1 year because my OLM said I was at 0% yet my mileage was only 2,697. Asked another way, is time a concern with oil quality or is it mileage that dilutes it over time?

Miles. No way I am changing oil at 6 months if I've only put 1350 miles on it. Unless you are uber paranoid. Can't dilute the oil if the engine isn't running.

 

[cornicekurt]

That makes the $5B Tariff hit GM complained about look like a good deal.. incidentally, looks like that "defective" Crankshaft was made "not here" based on the supplier report shared earlier.. ouch.. must be hurting now

I'd be interested to find who makes the Corvette crankshaft (part#12705121) which is a different part number but essentially the same thing. The differences are likely attributed to the different transmissions used (Corvette 8-speed has no flexplate, etc, etc,)..

Update: plot thickens

No actually I was partly wrong... likely not related to the transmissions

In fact when I pulled up the defective part # 12710954 (per RockAuto) on GM parts outlet it comes up with an updated part number and also shows some Corvettes use the same part if this is true (to be confirmed.. maybe call a dealer and get the part #s) why aren't they involved in the recall

View attachment 456530

This one is going to get uglier. I’ve got the 23 High Country Tahoe. Service manager at the dealership told me this afternoon that mine is in the “no resolution” file. (He ran my VIN). Said I’m getting a new engine.

 

[cornicekurt]

That makes the $5B Tariff hit GM complained about look like a good deal.. incidentally, looks like that "defective" Crankshaft was made "not here" based on the supplier report shared earlier.. ouch.. must be hurting now

I'd be interested to find who makes the Corvette crankshaft (part#12705121) which is a different part number but essentially the same thing. The differences are likely attributed to the different transmissions used (Corvette 8-speed has no flexplate, etc, etc,)..

Update: plot thickens

No actually I was partly wrong... likely not related to the transmissions

In fact when I pulled up the defective part # 12710954 (per RockAuto) on GM parts outlet it comes up with an updated part number and also shows some Corvettes use the same part if this is true (to be confirmed.. maybe call a dealer and get the part #s) why aren't they involved in the recall

View attachment 456530

What if I’m wrong and it’s 20k to swap em all out which is what I’m thinking will ultimately happen

 

[Kaminski]

So it appears some VINS (early 21s from some reddits) are already showing engine replacement recalls - N252494002.

Most other later years are showing oil swap - N252494000. This includes my 2022 Tahoe High country.

From what I gather, they are starting with the earliest production engines in the year ranges and will move in batches down the line from 21-24. The oil swap recall is a bandaid to try to help effected engines try to last until their turn comes up.

Sound right?

 

[WalleyeMikeIII]

So it appears some VINS (early 21s from some reddits) are already showing engine replacement recalls - N252494002.

Most other later years are showing oil swap - N252494000. This includes my 2022 Tahoe High country.

From what I gather, they are starting with the earliest production engines in the year ranges and will move in batches down the line from 21-24. The oil swap recall is a bandaid to try to help effected engines try to last until their turn comes up.

Sound right?

I don't think we know, because the recall bulletin for N252494000 is not yet released...there was a prelim copy, but the actual bulletin/TSB is not available publicly. I would love to see it though.

 

[jfoj]

For those of you advising on changing oil at 50% of OLM, is this mileage based or time based? I had an oil change at 1 year because my OLM said I was at 0% yet my mileage was only 2,697. Asked another way, is time a concern with oil quality or is it mileage that dilutes it over time?

I do not know the exact way the GM OLM works but it looks at a number of parameters such as fuel usage, mileage, engine temp, time and maybe some other data inputs. So it probably flaga at the 1 year mark, I know it flaga on an engine overheating.

But th 50% OLM is for people that drive their vehicles, probably around 3000-4000 miles, not the 7500 miles that they often trigger on.