The 2004 Rainier that I had rode a lot quietier. This 2007 has a wind noise starting at 35 mph and gets louder. I have had it back to 2 different dealers for this problem as suggested by GM motors. They can doing nothing at this time because of no recalls or service bulletins. It seems to me that it is the door seals on the back. Sounds like the back window is open a little on both sides
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