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Sunroof Leaking



I have a 2003 Avalanche that I absolutely love but on my first trip to the car wash the other day I discovered the sunroof was leaking. I'm taking it in Friday but just curious if anybody else has had this problem.
I have had this happen with my 2002. The dealership looked it over and saw no evidence of constant seepage. They said the sunroof isn't designed to withstand high pressure. ??? Our 2001 Bonneville's sunroof had no problem...

Anyway, do a search on "Re: MY sunroof leakS" and you'll find a discussion that occurred while back...