I’ve only got 112K on mine, but it’s almost always hooked to something or hauling heavy. I drive it like it’s meant to be driven, foot to the floor whether I have my trailers on the back or not. I do brake stands, whip donuts, yank big oak trees out of the woods, haul heaps of firewood through the woods, race anybody that’s willing, etc, and besides a few trips to the shop for warranty work, mainly emissions related, it’s been a solid truck. I guess I do currently have a crack in my radiator but I’m not in any big rush to fix it, even towing my gooseneck through the mountains it never gets warm. It’s been a pretty solid platform for me, a few more issues than my previous gen Duramax trucks, but again, mainly because of emissions.