Dealing with this same issue! Extremely frustrating My 2022 trail boss after 3 weeks of owning it ,is in a dealership in British Columbia,Canada waiting for a valve body and was told it’s all on back order I even called every dealership in bc ,Alberta and Saskatchewan and even in the states and nothing !! GM needs to do something about this absolute bs !! No information on a ETA or anything ! I have been told by multiple people that is this such an on going issue people are waiting months and just end up buying new vehicles!!not happy at all !