I have a 2022 Chevy Silverado 1500 LTD with the 6.2 and 57k miles on it. I too lost power while driving and happened to be towing a camper. It would not start, the 400 amp fuse on the wiring harness blew and there were multiple codes. There was a TSB issued about this problem, so I printed it ahead of time, and highlighted all of the codes that matched the codes on mine to bring to the dealership. After the dealership ran diagnostics, I was informed it needed an engine replacement. They did not provide an explanation as to why this happened. I was told GM will cover all costs for the replacement thankfully.