Took the car to the dealer today... the Service rep sat in the car while I drove him around... it only took him very little time to notice the squeaky noise and suggested it was caused by the door seal.... (same as what the TSB indidated). He seemed to have experienced this kind of case before.

However, while he was trying to make the appointment for next week, he noticed there was some parts "need to be ordered" and will let me know once the parts arrives. He sounded like he didn't know anything about this and show me a piece of paper that descibed it. I couldn't get all the details on the paper (they don't like clients knowing or asking too much ), but it looked like there's another TSB about this... and it did say "For internal use only" on top.

I'll update more once the part arrives.