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PSA: Do NOT buy a GM with a 6.2 engine

Posted on 8/24/26 at 8:41 am
Posted by kywildcatfanone
Wildcat Country!
Member since Oct 2012
141224 posts
Posted on 8/24/26 at 8:41 am
You have been warned.

Posted by teke184
Zachary, LA
Member since Jan 2007
105210 posts
Posted on 8/24/26 at 8:42 am to
Could have stopped at “Don’t Buy A GM”
Posted by SuperSaint
Sorting Out OT BS Since '2007'
Member since Sep 2007
151590 posts
Posted on 8/24/26 at 8:43 am to
quote:

Do NOT buy a GM

Posted by backbone
Colorado
Member since Jul 2026
161 posts
Posted on 8/24/26 at 8:45 am to
Definitely the worst trucks on the market right now.
Posted by UncleFestersLegs
Member since Nov 2010
17112 posts
Posted on 8/24/26 at 8:46 am to
So using 50w oil didn't magically fix the huge crank clearances? Shocking
Posted by Uncle JackD
Member since Nov 2007
59622 posts
Posted on 8/24/26 at 8:51 am to
quote:

Don’t Buy A GM”
To be fair, they’re all garbage these days. Whatever you buy, get the extended warranty. Even Toyotas aren’t trustworthy anymore.
Posted by kywildcatfanone
Wildcat Country!
Member since Oct 2012
141224 posts
Posted on 8/24/26 at 8:52 am to
They need a stop sell issued on them.
Posted by dkreller
Laffy
Member since Jan 2009
34303 posts
Posted on 8/24/26 at 8:53 am to
quote:

So using 50w oil didn't magically fix the huge crank clearances? Shocking

I thought it was the opposite? Too tight of a clearance.
Posted by LSUlefty
Youngsville, LA
Member since Dec 2007
28602 posts
Posted on 8/24/26 at 8:54 am to
They all suck now. Even the Tundra sucks with all the engine failures.
Posted by LSUGUMBO
Shreveport, LA
Member since Sep 2005
9930 posts
Posted on 8/24/26 at 8:57 am to
quote:

To be fair, they’re all garbage these days. Whatever you buy, get the extended warranty. Even Toyotas aren’t trustworthy anymore.


It’s like the glory days for car dealers. New and used prices are at all time highs, then you’re almost forced to add on thousands in warranties because it’s not a question of if, but when something major goes out.

My office mate just had her ‘23 Yukon XL roll over 100,000 and on her way home last week, all the dash lights came on and the car practically shut off. She got it to the shop and is waiting on a diagnosis. The code is a cylinder 6 misfire, which could be anywhere from a few hundred to a $10,000 repair.

Hers is not a 6.2L I don’t thing, but it’s still a $70,000 truck that shouldn’t be costing that much in repairs after 4 years and 100,000 miles
Posted by Hangover Haven
Metry
Member since Oct 2013
34803 posts
Posted on 8/24/26 at 8:58 am to
Dude went on 10 minutes talking about engine failure, but not explaining why they're failing...

Still crazy why GM is using such a lightweight oil...
This post was edited on 8/24/26 at 9:07 am
Posted by SingleMalt1973
Member since Feb 2022
25209 posts
Posted on 8/24/26 at 8:59 am to
quote:

They all suck now.


The safest bet is the F150 w/ Coyote 5.0 V8
Posted by HeadSlash
TEAM LIVE BADASS - St. GEORGE
Member since Aug 2006
56626 posts
Posted on 8/24/26 at 9:00 am to
Has the cause been positively determined? Angled Oil holes in the crankshaft?
Posted by jaytothen
Member since Jan 2020
8846 posts
Posted on 8/24/26 at 9:03 am to
Could just say don't buy a vehicle manufactured after 2020. They all suck arse now.
Posted by forkedintheroad
Member since Feb 2025
2718 posts
Posted on 8/24/26 at 9:04 am to
quote:

It’s like the glory days for car dealers. New and used prices are at all time highs, then you’re almost forced to add on thousands in warranties because it’s not a question of if, but when something major goes out.


You can 100% thank govt regs for this. Regs on efficiency and sales. The market has not been anywhere close to free for decades and this is the culmination of that. Cars are a snapshot of what socialism will bring us everywhere else.
Posted by backbone
Colorado
Member since Jul 2026
161 posts
Posted on 8/24/26 at 9:09 am to
I have to agree with you here. The ford diesels are still good. I run them hotshotting
Posted by Konkey Dong
Member since Aug 2013
2388 posts
Posted on 8/24/26 at 9:09 am to
quote:

The safest bet is the F150 w/ Coyote 5.0 V8


Coworker had one blow a few months ago. Got it replaced under warranty, then the warranty engine blew.
Posted by soccerfüt
Location: A Series of Tubes
Member since May 2013
76199 posts
Posted on 8/24/26 at 9:09 am to
They perform “Like a Rock”.
Posted by kywildcatfanone
Wildcat Country!
Member since Oct 2012
141224 posts
Posted on 8/24/26 at 9:10 am to
quote:

Has the cause been positively determined? Angled Oil holes in the crankshaft?


No, which is why the recall has been expanded and there is now an investigation because GM told them they had a fix, which is now failing on vehicles with the fix.
Posted by UncleFestersLegs
Member since Nov 2010
17112 posts
Posted on 8/24/26 at 9:16 am to
I guess I assumed GMs solution of going to more than double the oil viscosity wasn't because the tolerances were too tight.

After a bit of reading, apparently the journal oiling ports were machined too large causing low oil pressure so increasing viscosity is definitely a "fix" but a shitty one especially for a new engine
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