Hey guys, I have a 2004 Zo6. I just discovered this piece is missing and part of my air issue w/ the driver side window. Over the driver window at head level on the outside there is a little black "nub" like you thumb, that holds the glass in at speed. I am the second owner and someone apparently tried to get into the car damaging the weatherstrip and metal bracket that goes up the a pillar and over the door. I replaced everything but I'm missing this little piece that holds the glass. Anyone have one or know someone who has it? Gets louder as you go faster w/o it!! LOl Thanks guys Jim