re: GM's 6.2 & 5.3: Sudden Engine Failure

Had my 2018 Yukon Denali's AFM/DOD system fully removed with a Brian Tooley Racing cam and kit. It is smooth as silk now, has tons of power, linear power delivery, and never has that hesitation going down to 4 cylinders. Writeup here:

LINK /

I have a 2018 Silverado and 2024 Tahoe. 5.3 in both. I put the Range aftermarket part in both that deactivates the AFM/DFM. Please explain to me why you are still at risk for failure after installing the Range part. Thank you in advance.

Thin oil sucks arse.
5W?

Really?

I'm in my 5th Suburban since 1995. An average of 200 K miles on each. Most dependable vehicles I've ever owned. I think I replaced one fuel pump on a 2003 Model, that's it. 1M miles easily. All had the big V8. Not sure they were all the 6.2 but all the big V8 offered at the time. 15-18 MPG from start to finish. Great brakes.

My '24 has the Duramax 3.0. Best performance and fuel economy of them all. Quiet and 24 MPG. 66,000 miles so far. Can't imagine a better vehicle.

5w40 diesel oil is some good shite. Great for air cooled engines or turbocharged gasers

The problem is the shite oil pumps and lube strategy and 0w20 oils. They are all using variable displacement pumps now (as far as I know) and in the name of decreasing idle fuel burn are basically not pumping anything at idle to minimize pumping losses.

Its so frustrating that we've reached this point with transmissions and tires and everything else being so excellent and now the simplest thing in this equation, the damn engine, is the biggest problem.

Yep, that oil is excellent.

I thought 0W was thing, but couldn't remember for sure, ridiculous...

Fortunately we made it to the shoulder of I-10. When I lost the engine the truck switched to neutral and no other system failed, still had power steering, radio, Bluetooth, windows, hazards, etc. From the shoulder, I placed it in park and tried to restart the truck, engine light was on and it would never restart or even switch to neutral. Contacted Onstar for assistance and Officer Spivey with Houston Vehicle Assistance was phenomenal. Since we were stuck in Park, the First tow truck couldn’t load us on the the bed and a larger truck had to tow us to Knapp. When we got to Knapp, they put a jump box on the battery and nothing changed, that’s when the mechanic told us that the engine seized up. I thought it was an issue with the auto start stop or some sensor issue and that’s when I learned, nope complete engine replacement. Knapp and GM sent us to Hertz for a rental.

Extremely lucky it happened where it did, 2 or so hours earlier and we would have broke down on the Atchafalaya Basin Bridge. The NTSB opened the investigation because there were 39 instances where the loss of engine caused an accident.

I have a 2023 GMC 6.2. Motor started making a terrible noise at 59,000 miles. I had it towed to dealership. One of the lifters got stuck, broke off and ruin the head.Truck had 59,000 miles on it. They had to put a new motor in the truck. Truck sit in shop for 4 months before they found another one.

Man, that's not even funny. Imagine if your lady had been out driving alone and that did happen out on the bridge. This incident could have had a very different result. Wow.

Doesn’t matter if they blow up weekly. Baw Status has to be enforced. I’ll take 2.