Yukon22

I had the transmission update done to my 22 Yukon in Sept 24 and noticed a front howl noise shortly after. Brought it back to the dealer after few weeks and they are blaming it on tire noise. While I was in they performed the gateway module and radio update and now my speakers are making a static popping noise that was not there before. They also charged me a diagnostic fee for the "tire " noise but now I am suspicious that it's a transfer case issue.