I had breakdown of the TCV as well 2 weeks ago. Dealer in Ellensberg should have truck to me this afternoon. 14 days to the hour. My local dealer up here on coast said there were 20 TCV in the US last week in Ohio. I told Service lady in E-berg this and next day she said mine was on a rush since so new, and she bitched. You dealer is sucking.
Nextgen diesel is making new parts to update the TCV (which says to me there is a issue if you got aftermarket making parts). Some videos online it looks very straight forward and guy got it fixed asap instead of waiting weeks or months.
FWIW my local dealer said they had not seen any TCV issues in HD...then in last days of NOV 2 showed up in 8 days so now wondering if it's gonna start a wave.. I have not asked how Dec is going. '23-24 HD seem worse from my reading....but who knows?
2023 3500 Denali HD 39000 miles