I was reading this site and decided to join, great info for the scion community!! great work!
I just put a deposit down on a tC coupe and didn't notice the creaking but did notice the wind noise in a tC I test drove here in michigan. (auto didn't have any noise #3000 or so on the vin, the manual was earlier like 1800's and did have the noise for those who are curious to when the problem occurs in production run)

I contacted Scion about it and they told me they are aware of both problems with the sunroof, the creaking and wind noise. And are going to be issuing a bulletin to dealers shortly. I'd guess within the next week or two. But there is the good news that they know what it is and how to fix it!

Just thought i'd let all tC owners know.. :D

 

if you find out the service bulletin then post it up here

https://www.scionlife.com/forums/viewtopic.php?t=6534