- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
GM's 6.2 & 5.3: Sudden Engine Failure
Posted on 1/27/25 at 5:04 pm
Posted on 1/27/25 at 5:04 pm
I love that 6.2, so this is poor news. Problem affects the 5.3, spinning mains, possibly related to AFM.
The GM 6.2L engine, commonly found in Chevrolet and GMC trucks, is known to have issues including sudden engine failure, lifter problems, power loss, knocking sounds, and stalling, often attributed to manufacturing defects and the use of cylinder deactivation technology (Dynamic Fuel Management) which can lead to issues with the lifters when cylinders deactivate and reactivate; this can result in expensive engine repairs and is currently under investigation by the NHTSA due to numerous complaints about unexpected engine failures.
Replacement engine ia the only solution; looks 2019 and up...
The GM 6.2L engine, commonly found in Chevrolet and GMC trucks, is known to have issues including sudden engine failure, lifter problems, power loss, knocking sounds, and stalling, often attributed to manufacturing defects and the use of cylinder deactivation technology (Dynamic Fuel Management) which can lead to issues with the lifters when cylinders deactivate and reactivate; this can result in expensive engine repairs and is currently under investigation by the NHTSA due to numerous complaints about unexpected engine failures.
Replacement engine ia the only solution; looks 2019 and up...
31
Posted on 1/27/25 at 5:11 pm to N2cars
Glad my 2024 has the 3.0 Duramax. It is not without fault but at least they aren't known for eating lifters and spinning bearings.
Posted on 1/27/25 at 5:11 pm to N2cars
quote:
I love that 6.2, so this is poor news. Problem affects the 5.3, spinning mains, possibly related to AFM.
damn! was looking at Chevy trucks this past weekend, it could have been me!
Posted on 1/27/25 at 5:12 pm to N2cars
quote:
cylinder deactivation technology (Dynamic Fuel Management)
If Trump gets rid of this stupid shite that automakers force upon consumers so that they can meet some pie in the sky fuel savings mandate, I'd be willing to vote him in as emperor for life.
Posted on 1/27/25 at 5:12 pm to N2cars
There are no reliable engines being made on par with what we saw pre-Covid due to the CAFE changes imposed by the Biden admin.
They were all rushed out and traded reliability for fuel efficiency.
They were all rushed out and traded reliability for fuel efficiency.
This post was edited on 1/27/25 at 6:08 pm
Posted on 1/27/25 at 5:13 pm to N2cars
AFM is a trash design. I disabled it on my 2010 silverado
Posted on 1/27/25 at 5:41 pm to N2cars
One of the (older) performance 6.2L is the way to go. No AFM garbage.
This post was edited on 1/27/25 at 5:42 pm
Posted on 1/27/25 at 5:42 pm to Them
Did you know there is a rubber web belt between the motor and transmission? Have to remove trans to replace
Posted on 1/27/25 at 5:48 pm to blue_morrison
Yeah, my LS3 doesn't have it.
Posted on 1/27/25 at 5:51 pm to N2cars
Time to unload the vette
Posted on 1/27/25 at 5:51 pm to N2cars
We are looking to get my wife a car and I am really tempted to just wait a couple of years to see if the industry responds with something that is workable for us. There are way too many problems with post-covid vehicles
Posted on 1/27/25 at 5:53 pm to bamacoullion
Recommended at 150k or 200k miles depending on the LM2 or LZO. I’d bet they are conservative with those recommendations too, though I wouldn’t chance it.
Posted on 1/27/25 at 5:55 pm to N2cars
Every one of these reports I see (from all manufacturers) makes me appreciate my 19 year old Tundra even more.
Posted on 1/27/25 at 5:56 pm to tide06
quote:
There are no reliable engines being made on par with what we saw pre-Covid due to the CAFE changes imposed by the Biden admin.
And nobody voted for this shite…it’s mandates by beaurocrats over bullshite reasons.
Let the manufacturers make what sells.
Posted on 1/27/25 at 6:03 pm to A12 Oxcart
One of GM's best engines. I have one also.
Posted on 1/27/25 at 6:04 pm to blue_morrison
quote:
One of the (older) performance 6.2L is the way to go. No AFM garbage.
True. Same for the 5.3. That engine has been around forever and been reliable until all this AFM stuff. I have the 5.3 in 2018 Tahoe and considering having the AFM disabled.
Posted on 1/27/25 at 6:09 pm to N2cars
Yep, happened Friday before last to our 2023 Surburban with 42k miles. Lost engine at 75mph on I-10 in Houston with no prior issue whatsoever. Had it towed to Knapp Chevrolet and mechanic said he has to replace 4-5 engines per month in the 1500 platform. Lowest mileage replacement was 4,000 miles on a 6.2.
Posted on 1/27/25 at 6:11 pm to Beessnax
quote:
We are looking to get my wife a car and I am really tempted to just wait a couple of years to see if the industry responds with something that is workable for us. There are way too many problems with post-covid vehicles
I’m holding.
The current vehicles are overpriced and not road proven.
My hope is that Trump will walk back the changes so the pre-Covid engines can be brought back as an option.
Posted on 1/27/25 at 6:11 pm to Mstate
quote:
Same for the 5.3. That engine has been around forever and been reliable until all this AFM stuff. I have the 5.3 in 2018 Tahoe and considering having the AFM disabled.
They have absolutely fricked up the 5.3. It was one of the best and most reliable engines and now it’s basically shite on new vehicles.
Posted on 1/27/25 at 6:21 pm to Mstate
Deactivating it on the computer doesn't ultimately solve your problem. You still have shite lifters. Ask me how I know. I've had to replace the lifters/cam in my 08 Silverado(did it myself) and the whole engine let go on my wifes 2015 Escalade.
Page 1 of 7
Popular
Back to top
Follow TigerDroppings for LSU Football News