NHTSA opens preliminary probe into more than 870,000 GM vehicles

[Fless]

https://gmauthority.com/blog/2024/04/some-2023-gmc-sierra-and-yukon-units-will-need-a-6-2l-v8-engine-replacement/

So not really a recall, just a Customer Satisfaction Program.

 

[TheAgency]

Sorry to hear about your vehicle. It sounds like you heard the bottom end problem before it hard failed, unless for some reason the noise if from the High Pressure Fuel Pump. Could alse be the thrust bearing going on the crank?

A few quesitons:
Assume you are the original owner?
What weight oil did you run? 0W20, 5W30 or other?
You indicated you were fussy about fuel quality, explain this please? 89, 91, or 93 Octane and a specific brand?
What is the build month and date on the vehicle?
Since your vehicle is a 2023, do you know if your vehicle fell within the "Oversize Lifter Bore" group? Were you ever notified by GM about this issue?

Please update the thread on what the dealer finds as well.

Just trying to gather more context on these failures.

-I am the original owner. (I am nuts and OCD. I have the entire front end wrapped in PPF, handwash only, no eating in the truck, etc)
-Always 0W-20 per GM Spec
-93 Octane from BP is my preferred source of fuel, from a specific station that I trust. Will settle for Holiday 91 Octane when I have to, as they are all over MN.
-I can't reference the build date at the moment, with the truck at the dealership currently. I ordered it and it was delivered late August 2023.
-I was never notified by GM about any issues.

I'll update again on what the dealer finds.