If it was me, I would want nothing to do with an engine manufactured in the defective window especially with all the damage the 0W-20 has done already..… since GM is playing unfair but convenient-to-them games here, I’d try to end that engine asap and try to set that P0016 code
@jfoj have you received the recall notice yet ?
Many parts here.
#1. Unclear if the majority of the replacement 6.2l are pulled as new engines from the production line or how may are remanufactured by a 3rd party for GM. Both can and have been problematic. We have seen a number of reports of failed replacement 6.2l in as short of a time where the vehicle never left the dealer, hundreds of miles or between 3-15k miles as I recall. Of these failed engines I have no idea if they were all remanufactured or if there was a mix with new builds pulled form the engine assembly plant and remanufactured engines.
#2. If a new engine was pulled from the production line and sent to a dealer for replacement and it has a build date before the magical June 1, 2024, then these engines may have the same problem as the engines within the Recall window that have been failing. This may be why we have seen a number of failed replacement engines.
#3. As for remanufactured engines, the majority of these engines would likely need a new crankshaft due to spun bearing heat and wear damage. Maybe there were other failures where the crankshaft was not damaged. But assuming the remanufacturer needs a replacement crankshaft they would likely be coming from the same foundry that is making the crankshafts for new engines builds. If these cranks were obtained before the magical June 1, 2024 date, the remanufactured engine may have the same problem the original engines had or at least something close.
As for my 2024 Yukon Denali XL, I have not received a Recall notice. This is because my 2024 Yukon has a build month of 8/2024 and the engine production date was July 15, 2024. So I am 6-8 week beyond the magic correction date of June 1, 2024.
What bothers me about all of these is GM had a number of 6.2l manufacturing problems during the 2022-2024 production window. I have found bulletins/Recalls for the 3 following problems: Main Bearing Cap Bolt Torque being too low, Oversize lifter bores, then what we are all monitoring at the moment is the Crankshaft tolerance and debris issue and connecting rod debris/contamination problem. While I think GM may have found the Main Bearing Cap Bolt Torque and the Oversize Lifter Bore problems on their own, it is somewhat coincidental that GM found the Crank and Rod problem 6 months BEFORE the NHTSA investigation was opened and then it took another 4 months before the Recall was issued.
Part of my things GM was trying to bury the cat turd in the catbox on this latest issue. They knew 6 months BEFORE the NHTSA investigation and corporately decided to do nothing, not even come out with a Customer Satisfaction Program to do at least what they are doing now for the Recall. And they choose not to extend the engine Warranty on any of the vehicles with the 2 year build year.
Hey GM Executives, are you listening???? Since your Engineers are so confident that changing to 0W40 engine oil in the compromised 6.2l engines you built for 2 years, where is the 15 year/150,000 mile 6.2l engine Warranty for all of those impacted? If your Engineering group is so confident that the oil spec change will save all these engines, then GM, you will spend $0.00 on extending the Warranty coverage for these compromised engines. Understand that all those impacted now are the girl nobody will ask to the Prom!!! Who will buy these off the dealers lots? Who will loose money on trade in? Who will be inconvenienced if the recalled engines fail outside of the powertrain Warranty? Who is going to step on when the dealer sold the customer an Extended Warranty or the owner buys an extended Warranty and the Extended Warranty company denies the claim because GM 6.2l engines in a 2 year period had a KNOWN defect/problem?? How does this work? #GM, #GM Investor Relations, #Mary Barra
This is why I started out overly cautious with oil changes, oil analysis, ditching the 0W20 engine oil and so forth. I think GM needs to earn the trust back from the customer base that shelled out stupid money for these light duty trucks and SUV's.
Do I think I am 100% in the clear, Not sure????
Do I think maybe I dodged a bullet, MAYBE???
Will I continue with shorter OCI, Yes.
Will I continue with oil analysis, Yes. Adds at least $40 to each oil change!!
Will I rely on 0W20 in any of my vehicles, No.
Will I be nervous driving my 2024 Yukon, Yes.
But I have been doing everything in my power to take care of the 6.2l to eliminate anything that may tip the scales in the wrong direction. I hope and pray that GM did clearly and fully identify a set of problems and get them resolved. But like any great corrective measure if they are not pulling like every 50th or 100th engines from the assembly line and tearing it down for inspection, they are really doing nobody any favors, especially themselves.
We shall see if this is the only version of 6.2l Hell that is released of if there is a sequel in the future.
