It is GM's fix for the water leak on the sliding window, they do not specifically tie the leak and glass issues together. As I mentioned my theory is pure speculation, in my opinion the leak could very well be getting on something electrical creating a short or power surge through the defroster that causes the glass to shatter. I am by no means an expert on the subject and will gladly admit that I was wrong if it proves I am, I just feel like it makes sense that the water leak and my electrical short being in the same exact area and not just a coincidence.