Quote Originally Posted by brandonl2000 View Post
i can almost promise you its the water leak under the windshield cowl thing. it's a $3 part from the dealer. as soon as you remove the cowl you will see the failure. my rubber seal was just hanging off.

do this. be done with it. http://www.grandprixforums.net/water...-fix-6961.html
yep, if it's on the passenger side, coming from near the top of the carpet, that's most likely what it is. It's a very easy fix, and works great. I checked my car after fixing it, after the hardest rain I've ever seen in my life, and there wasn't a drop inside the car.

Also welcome!