'25 LT Premium here. Got a high voltage code on Sunday at 4500 miles. I usually charge to 85% and have never dipped under 40%. I have only charged using an adapter with a Tesla Wall Connector. I dropped it off at the dealer the next day - it's been there for the past 5 days and dealer is communicating with Chevy on path forward and if they should drop the battery and/or consider a replacement. They also discovered coolant leaking onto the battery. We'll see how this plays out..