Is this it?: 88970212, Tensioner, Drive Belt (GT)This came off of this awesome post from Ragingfish:
http://forums.genvibe.com/zerothread?id=9923 Good luck!Edit: I'm not sure, but you might not need to buy it for megabucks from the dealer. I paid around $60 or so for mine. This thread also talks about the different prices:
http://forums.genvibe.com/zerothread?id=28460