A handful of engines ate plugs, which created the failure over an internal failure, ie crank or lifter failure.
On the L87 comment, I had a 2022 GMC AT4 with this engine. I proactively switched to Supercar 0w-40 from 0w-20 and it got quieter. Oil pressure was improved under all temps. After it passed pico test with 0w-40 (never told the dealer before the test) they claimed good engine. I had 20k miles and decided in Jan to trade to another brand because I couldn’t “trust” the engine. To be fair, the engine never failed me, but I hated thinking about, and shouldn’t have too.
I just got pissed with the way Mary Barra is handling the whole situation. She’s a lying terrible leader and could give a rats ass about any of us.
So, I will not spent anymore money with GM at this time, and while I know every brand has problems, for me, it starts at the leadership level and how they handle. Many owners of those engine have waited months for replacements.
I still have my 2022 5BW and plan on keeping it. I only have 1855 miles, an extended warranty, love the hell out of it, and in the future after warranty if I have an engine problem, I will and can rebuild it myself. I also have two other LT4 vehicles with no engine issues (2016 Z06 & 2017 ZL1). Both have more mileage than my 5BW, and both have separate non-engine related issues, but I have accepted.
When I retire in a few years, I figure I’ll have more fun cars to choose from.