Okay, thank you! I will save this post. I also have been doing all I can to help with the shortfalls i.e., Catch can, Filtermag, Lucas's oil treatment, turning off Auto Stop, no hot-rodding, frequent oil changes at first couple thousand miles. It's kinda a ridiculous obsession, but it does run super quiet even with the hood up. My Denali 5.3L was built in DA Mexico in February '21. I am fairly sure none of my efforts will fix a bad lifter or lifter spring. I do wish GM would send out a recall on this issue so I could have some peace of mind. I travel on long trips with family. If it leaves me stranded that will probably end my relationship with GM and I will return back to Toyota for good where I didn't have these worries. I just liked the Denali offerings, so I thought I'd give it a try and then this carp I learned about. It was all rainbows and unicorns at the dealership when purchasing...Ha.