DMAX 23

New here. I purchased my 23 Sierra 3.0l with the 10 speed end of Jan. 2023. I put 53k on it so far, 90% highway miles and I am also having valve body issues. Been in the shop 3 weeks now since they can’t get the part. Spoke with the Service Manager yesterday and he mentioned if they can’t find a part soon he will put in a request to replace the entire transmission. Hoping this doesn’t take to much longer.