So...the SAME thing just happened to me. I have a 2021 6.2L High Country purchased in February. 9000 miles and Pop, pop, pop then tick, tick, tick, tick. Lifters crapped out. Had it towed to the dealer. Confirmed problem and now waiting for tech to evaluate damage. Can’t even look at it for 12 days! Sooo question is, is this a lemon? Will I continue to have trouble with this thing? Once this thing is fixed, will it stay that way or will it continue to have issues.
Any luck in the buy back? I’ll move up to a 250O, anything not to have to go through the HELL of a crappy truck!