I had a rock chip about 1 1/2 months ago here in Colorado. The next morning I had it filled. My Ascent Limited went into service for 3 weeks (waiting on a part while it sat in their parking lot) and I just picked it up but I noticed at the dealership (as I was transfering my stuff from the loaner) that the filled chip now was a full fledged long crack. Not the dealership's fault of course but sh-t happens. I drove directly to the glass store and will be getting a replacement in about a week.