Currently we have the 2012 Buick at our mechanics shop and will know more next week. We've done everything possible and finally took it to the shop. They showed me this has been a problem for this car since 2013. In the past whenever we saw some water we figured the window was open a little or something like that. This is our 4th or 5th Buick but it may be our last. They aren't the company we started with.