There is a different windshield for convertible and coupe. Make sure they order the correct one. Check out the markings on the windshield to make sure the replacement one is the same correct GM part, not aftermarket. I had to take it back because the mirror was not correctly positioned, and hit the roof console when adjusting it. Aside from the mirror, which was easily resolved, I just took it to the dealer where I bought it, and had them fix it. But I have always had good luck with my dealer. Some are nightmares.