New bulletin/Campaign 6.2 L87

customboss · November 6, 2025

9 minutes ago, PunchT37 said:

11 hours ago, MrLeadFoot said:

Not sure if I should thank you or not because, based on what they found in this video on both engines, this has me thinking ALL these engines are going to blow at some point, some just sooner than others. In other words, it looks like the journals and bearings are going to wear at an accelerated rate, and we will all experience the issue at some point, and GM is hoping that MOST of them will die AFTER the 150k mile obligation they settled on with the NHTSA. Your thoughts?

Expand

I believe you are correct. Those cranks suck. The chamfers are way too big. Roughness is bad but, how many cranks are worse than that on the many rebuilds that many bring to everyday machine shops? Stock rebuilds, hot rods, etc. Most to all seem to last anyway.

Im with ya.

PunchT37 · November 6, 2025

13 minutes ago, customboss said:

Not a player. 9 cSt vs 11 cSt @ 100c won’t save a rough crank.

Thinner oils need a smoother surface. There are a lot of rough cranks out there lasting. But, yes, you are correct.

PunchT37 · November 6, 2025

Real problem is, those cranks have 2 big problems. One or the other is bad enough. But 2? Hmm.

customboss · November 7, 2025

Maybe trade in your 6.2 for this?

PunchT37 · November 9, 2025

Took a screenshot of a L84 build. One can see the huge difference between the chamfers of the 5.3 cast crank vs the 6.2.

EfiBB69 · November 10, 2025

Looked like a handful of sugar sand on the bottom of the pan.

Both of the engines they took apart had failed the pico test. I would like to see one that passed taken apart.

MrLeadFoot · November 10, 2025

2 hours ago, EfiBB69 said:

Both of the engines they took apart had failed the pico test. I would like to see one that passed taken apart.

Me, too!

johnnyquick · November 10, 2025

Transient (A member here) is all good with it, he explained to me that crying and whining is not his cup of tea, and ohh well he says to his wife if it blows up I will eat it as I am too cool to worry about getting screwed over.

LMAO

Posted November 2 (edited)

I appreciate your honesty, but there is a difference between honesty and an opinion. It would've been nice if the title had solely been informational, as opposed to toxic. I am in that group of model years the NHTSA is now looking into. I'm glad they are. And, if I'm adversely affected, it is what it is. I was already planning to prepare for the worst at 100,000+ miles. My wife heard me watching the video and asked what I would do if my engine failed (again, ie, repeat of 2007 Tahoe engine failure caused by DOD) at 96,000 miles and 6 months out of warranty). My response was simple: Rebuild it stronger (deleted and cammed) and supercharged. I'm keep the truck, even though I paid for it with my "imaginary" money. It's cheaper to repair it than to replace it. I believe in falling forward. When you fall, it sucks. But, get yourself up and in a position where you benefit from it. Today, (to paraphrase poet Robert Frost) I choose to take the road less traveled. Doing as the majority does, pissing and whining, hasn't benefitted me ever. Sorry a simple opinion from a simple man struck a sour note with you. It's just a shame that a comment that didn't tear anybody down, nor lay blame or insult, cause such a tirade of a post. Have a good evening, sir. I said what needed to be said in my original post. Now I'm done. Any reply from you will fall on deaf ears.

Edited November 2 by Transient

Edited November 10, 2025 by johnnyquick

WeGone · November 10, 2025

My finale comments on this as I no longer have a dog in this fight, Sold my 2021 LTZ Z71 6.2 this year with 17K miles after finding the glorious glitter in the oil. Yes I lost my a$$ on it.

@ 70 I thought this would be the last truck I would buy and the first show room new. I was a die hard GM fan owning many Silverodo's and GMC's over the last 50 years. Gone are the days of driving a GM truck 250K-350K miles with proper maintenance. Will I ever buy another new GM truck...Only if early 2000's or back.

I do want to thank everyone here for there support and help. Great forum. Not leaving the forum just dropping back to the older truck section. Good Luck to everyone with there issues.

KARNUT · November 10, 2025

16 minutes ago, WeGone said:

My finale comments on this as I no longer have a dog in this fight, Sold my 2021 LTZ Z71 6.2 this year with 17K miles after finding the glorious glitter in the oil. Yes I lost my a$$ on it.

@ 70 I thought this would be the last truck I would buy and the first show room new. I was a die hard GM fan owning many Silverodo's and GMC's over the last 50 years. Gone are the days of driving a GM truck 250K-350K miles with proper maintenance. Will I ever buy another new GM truck...Only if early 2000's or back.

I do want to thank everyone here for there support and help. Great forum. Not leaving the forum just dropping back to the older truck section. Good Luck to everyone with there issues.

You’re echoing my exact thoughts. My retirement truck was a new 2014 Texas Edition. I had a 92 Chevy truck that was modified and lowered. The cylinder deactivation drove me batty. I traded the 14 in for a SUV. I had the 92 for 12 years and later the avalanche a 2002 for five. There isn’t a used full size truck I’d feel comfortable buying. When you get older you buy the most reliable. I never thought I would have anything but GM in my driveway.

GETGONE · November 10, 2025

Never got a second letter and the recall had disappeared from the app, but I checked it again yesterday after there was an app update and it showed a required recall and the ability to book a service appointment specifically for the recall. Have an appointment for Thursday the 13th but got a call that they need it overnight. Now I gotta find somebody to pick me up and drop me off to pick it up the next day. I'm close to being due for an oil change anyways so it works out. Hopefully it passes.

MrLeadFoot · November 10, 2025

23 minutes ago, GETGONE said:

Never got a second letter and the recall had disappeared from the app, but I checked it again yesterday after there was an app update and it showed a required recall and the ability to book a service appointment specifically for the recall. Have an appointment for Thursday the 13th but got a call that they need it overnight. Now I gotta find somebody to pick me up and drop me off to pick it up the next day. I'm close to being due for an oil change anyways so it works out. Hopefully it passes.

Can't they take you where you need to go after you drop off the truck, and pick you up when your truck is ready?

GETGONE · November 11, 2025

3 hours ago, MrLeadFoot said:

Can't they take you where you need to go after you drop off the truck, and pick you up when your truck is ready?

They stated on the voicemail they don't provide shuttle service. I'm also about 20 miles from the dealer. My parents live about 40 minutes from the dealer and they're in their 80's so I hate asking them to drive there to pick me up. I know for the engine replacement they are supposed to provide a rental if needed. I'll try to call tomorrow and see if I can get a rental. They gave me one when they had a service bulletin when I had it in before and wasn't expecting them needing to keep it overnight.

MrLeadFoot · November 11, 2025

16 hours ago, GETGONE said:

They stated on the voicemail they don't provide shuttle service. I'm also about 20 miles from the dealer. My parents live about 40 minutes from the dealer and they're in their 80's so I hate asking them to drive there to pick me up. I know for the engine replacement they are supposed to provide a rental if needed. I'll try to call tomorrow and see if I can get a rental. They gave me one when they had a service bulletin when I had it in before and wasn't expecting them needing to keep it overnight.

Wow, they should take care of your transportation, especially since you're under still warranty. I don't know of one dealer in my area that wouldn't AT LEAST shuttle you. Some have given me rentals, others hired Uber. Even the Mazda dealership gives my wife a loaner, and her car was less than $40k.

bruincounselor · November 11, 2025

It only took the dealer and GM corporate three days to get me a loaner when my 6.2 failed the pico test. Don't plan on one immediately if you need one.