New bulletin/Campaign 6.2 L87

[MrLeadFoot]

1 hour ago, 66ss3964spd said:

Part of the recall is to scan for a P0016 DTC. P0016 is basically a rotational timing difference between the crank and the cam that the ECU does not expect to see. Given the defect(s), rod and/or crank bearing failure, I be really interested to know exactly how P0016 can point to imminent or current bearing failure.

This is puzzling to me, too. Given the code they are "inspecting" for, if it's there you obviously have the problem, and your motor is on its way out. But, what I don't get is how they can rule out if your motor is NOT a candidate from failure without physically inspecting the parts in question which requires getting inside the block. But, then again, GM is not stating exactly which parts are the problem, and understandably so, because if they actually stated words like "crankshaft" or "connecting rod", the public would know that their proposed "inspection" doesn't do a darned thing except idenitify an already compromised motor via the P0016 code, whereas a physical inspection would help determine if something is beginning to score.

 

I think the ambiguity of the recall procedures is quite telling. GM obviously doesn't want to replace 600k motors, so if they can placate the NHTSA by pretending to do an "inspection", that's what they're going to do. I just don't understand how the NHTSA is accepting what GM has proposed to do. I guess from a safety standpoint GM is telling the NHTSA, "A truck comes in with a service engine soon light on. If we pull code P0016 we can prevent that truck from being on the road again in that condition, thus we are making the road a safer place." But, they would do that anyway even if there was no recall, if a customer came in with a P0016. So, it doesn't sound like much is being done by GM (aside from us getting 40w oil and a new oil filler cap). And, after letting 28,000 cases go by before doing anything at all, it appears the NHTSA doesn't care that much about the consumer, either.

Edited May 1, 2025 by MrLeadFoot

[PunchT37]

Could it be 0w20 oil in a 420hp engine? The vette and camaro 6.2`s have a 5w30 or 0w40 as spec or a 5w50 for track use. Hmm. Add an engine that`s on the tight side of the tolerances from new, add a hot day, some rpm`s/load and the bearing gets grabbed by the growing journal, because of the water like oil film, and spins. This closes off oil passages AND sends trash all over and finishes the engine off. Hmm. Could it be? The car 6.2`s seem to be ok.

 

Did GM get the car 6.2 low end parts from a different vendor? Why just trucks with thin oil? What if one added a blower to a L87 for more power and ran 0W8 oil? Would the thin oil fans do this? Hmm.

 

Maybe the engineers were wrong in the 1`st place? Maybe they know something with their new oil cap? Will they get in trouble with the government by using heavier oil?

 

Just asking why the trucks. Seems the vettes should have dimension and debris problems too? Maybe the vendor gave them select good parts?

[tbarn]

6 hours ago, Pinnacle said:

Hey bud

 

I came across one of your posts about you doing a fix on trucks with regards to the Power assist recall .  Im having this similar type of issue on my moms 2017 Sonic where she turns the wheel and it will sometimes take over and over compensate and turn the wheels more then it should be. have you seen this before , is there a fix?

 

Thanks 

Don't know of any issues like that. Don't see any bulletins/campaigns.

[WeGone]

Wouldn't P0016 give you a check engine light? 

[MrLeadFoot]

30 minutes ago, WeGone said:

Wouldn't P0016 give you a check engine light? 

Exactly! That's why I say the recall "inspection" isn't really an inspection if that's all they're looking for! Something sounds fishy to me.

[Snow White]

I grew up 20mins from Tonawanda and asked some friends if they had any contacts there, I might be able to get an answer to who the Tier 1 is for camaro and vette rods and crank.  I'm pretty confident AA and QM don't supply the Camaro or Vette LT1 etc. rods and cranks.

 

P0016 would show crank sensor signal intermittent or nonexistent because the crank bearings are wasted due to............................

Edited May 2, 2025 by Snow White

[PunchT37]

23 minutes ago, Snow White said:

I grew up 20mins from Tonawanda and asked some friends if they had any contacts there, I might be able to get an answer to who the Tier 1 is for camaro and vette rods and crank.  I'm pretty confident AA and QM don't supply the Camaro or Vette LT1 etc. rods and cranks.

 

P0016 would show crank sensor signal intermittent or nonexistent because the crank bearings are wasted due to............................

See what you can find out.

[Snow White]

well, 002 bulletin is out.  Engine build date has to be prior to July 1, 2024 which is an update to the previously reported June 1, 2024 date.  It's not the door tag, it's the tag on the drivers side cylinder head beneath the valve cover, back of the engine, which you need to access from beneath the truck/suv.  where K124183xxx is shown 24=2024 and 183 is the 183rd day of the year or July 1.  So if you're 24183 or a lower number you're in the recall. If anybody has access to the 002 bulletin, we'd appreciate seeing it!  Seems like dealers have it on dealer network as of yesterday/last night it seems based on a photo i saw on a facebook group.

 

so as it stands, if you get the recall you get inspected

if you're not throwing a code you get 0-40 oil and oil cap (when the parts are avail)

new info is, if you're engine is pre 7/1/24, it fails, you're out of warranty, you get a new one.

the problematic part is for everyone outside of the date range who also fail engines especially those out of warranty.

 

I'd expect some future update to the bulletin to be replace all the engines regardless if they fail or you get a 100,000 mile warranty......... that speculation is likely because people will have engines fail who got the recall, passed inspection, and got 0-40 oil and then it failed anyways.  in my opinion, this is a reasonable approach to dragging out the engine replacements over a period of time instead of recall all of them at once with far too few engines to cover that anyways (avoid a panic dealer rush).

 

more opinion, gm requiring 40 oil on engines that aren't guaranteed to have over sized clearances immediately invalidates warranty denial for those who do the same, but aren't required to.  If I put 40 oil in without validating a specific problem with my parts, i've done exactly what GM did.  the engine passed inspection and for no reason other than a potential problem, they changed the oil and so did I.  the LT1's use 40 oil, I doubt a warranty denial for 40 oil would make it to arbitration, especially if you tear it down and find an out of spec part.  however, it'll be a fight and a nuisance to deal with and may require legal counsel/lawyer up so proceed at your own risk.

Edited May 2, 2025 by Snow White
door tag vs engine tag and date explanation

[newdude]

36 minutes ago, Snow White said:

well, 002 bulletin is out.  Engine build date has to be prior to July 1, 2024 which is an update to the previously reported June 1, 2024 date.  It's not the door tag, it's the tag on the drivers side cylinder head beneath the valve cover, back of the engine, which you need to access from beneath the truck/suv.  where K124183xxx is shown 24=2024 and 183 is the 183rd day of the year or July 1.  So if you're 24183 or a lower number you're in the recall. If anybody has access to the 002 bulletin, we'd appreciate seeing it!  Seems like dealers have it on dealer network as of yesterday/last night it seems based on a photo i saw on a facebook group.

 

 

 

N252494002 Bulletin .pdf

 

N252494002 FAQ's.pdf

 

This so far is on in stock vehicles (new and used inventory).  Not sure if any customer VINs have been tagged with 002 yet. 

 

If the truck has NOT had an engine, it gets an engine.  If it has already been replaced, inspect for the build date window.  If under the window, replace the engine.  

 

Oil goes to 0w20 for these in this recall, NOT 0w40.  

Edited May 2, 2025 by newdude

[WeGone]

37 minutes ago, Snow White said:

well, 002 bulletin is out.  Engine build date has to be prior to July 1, 2024 which is an update to the previously reported June 1, 2024 date.  It's not the door tag, it's the tag on the drivers side cylinder head beneath the valve cover, back of the engine, which you need to access from beneath the truck/suv.  where K124183xxx is shown 24=2024 and 183 is the 183rd day of the year or July 1.  So if you're 24183 or a lower number you're in the recall. If anybody has access to the 002 bulletin, we'd appreciate seeing it!  Seems like dealers have it on dealer network as of yesterday/last night it seems based on a photo i saw on a facebook group.

 

so as it stands, if you get the recall you get inspected

if you're not throwing a code you get 0-40 oil and oil cap (when the parts are avail)

new info is, if you're engine is pre 7/1/24, it fails, you're out of warranty, you get a new one.

the problematic part is for everyone outside of the date range who also fail engines especially those out of warranty.

 

I'd expect some future update to the bulletin to be replace all the engines regardless if they fail or you get a 100,000 mile warranty......... that speculation is likely because people will have engines fail who got the recall, passed inspection, and got 0-40 oil and then it failed anyways.  in my opinion, this is a reasonable approach to dragging out the engine replacements over a period of time instead of recall all of them at once with far too few engines to cover that anyways (avoid a panic dealer rush).

 

more opinion, gm requiring 40 oil on engines that aren't guaranteed to have over sized clearances immediately invalidates warranty denial for those who do the same, but aren't required to.  If I put 40 oil in without validating a specific problem with my parts, i've done exactly what GM did.  the engine passed inspection and for no reason other than a potential problem, they changed the oil and so did I.  the LT1's use 40 oil, I doubt a warranty denial for 40 oil would make it to arbitration, especially if you tear it down and find an out of spec part.  however, it'll be a fight and a nuisance to deal with and may require legal counsel/lawyer up so proceed at your own risk.

Could you decode this 2021 6.2 build date of truck 03/21. I know my build date fall in the range but does the motor? N1210561CU8X0198

 

Edited May 2, 2025 by WeGone

[newdude]

8 minutes ago, WeGone said:

Could you decode this 2021 6.2 build date of truck 03/21. I know my build date fall in the range but does the motor? N1210561CU8X0198

 

 

 

Recalls are VIN specific.  You will have to run your VIN and see which of the 3 recalls will apply to it.  So it could be 000, 001 or 002 recall.  

 

Julian is 21056 so 56th day 2021.  

Edited May 2, 2025 by newdude

[diyer2]

GM and other manufacturers have made motors that were reliable. New designs and material to cut costs makes no sense.

[PunchT37]

25 minutes ago, diyer2 said:

GM and other manufacturers have made motors that were reliable. New designs and material to cut costs makes no sense.

My thoughts too. If they made good engines in the past, they still know how.

[66ss3964spd]

Interesting that 001 and 002 are out, but 000 is not.

Edited May 2, 2025 by 66ss3964spd

[MrLeadFoot]

3 hours ago, newdude said:

 

 

N252494002 Bulletin .pdf 246.92 kB · 22 downloads

 

N252494002 FAQ's.pdf 101.71 kB · 18 downloads

 

This so far is on in stock vehicles (new and used inventory).  Not sure if any customer VINs have been tagged with 002 yet. 

 

If the truck has NOT had an engine, it gets an engine.  If it has already been replaced, inspect for the build date window.  If under the window, replace the engine.  

 

Oil goes to 0w20 for these in this recall, NOT 0w40.  

So, it sounds like the dealer network gets priority over the customers because regardless of whether the unsold trucks on the lots are new or used they get new motors, while customers with trucks only get an oil switch to 0w40, unless the motor is compromised at time of inspection. 

 

Something is not right here. Please tell me I'm reading this wrong because this sounds completely unfair.

 

Edit: Wait a minute. Under the Dealer Responsibility section of the bulletin it says:

 

"In addition, for vehicles entering your facility for service, you are required to ensure the customer is aware of the open recall and make every reasonable effort to implement the program correction as set forth in this bulletin prior to releasing the vehicle."

 

That wording right there sounds to me that we indeed get new engines, too, because, unlike in the previous bulletin, nowhere in this bulletin does it say anything about an inspection, it only talks about engine replacements of motors built within certain dates. Does this 002 supersede the previous bulletin? 

Edited May 2, 2025 by MrLeadFoot