Thanks to the mechanic that worked on my Buick. It runs good! The troubling noise is gone, and I am happy that Davis Automotive was able to find the real problem. Yes, with the notation on the paperwork, which the lady in the office pointed out, I had told the wife several times, my side vents were NOT as cool as her side was. I am very grateful that the tech took the initiative to investigate that possibility of a problem. Once again (3rd visit), I am pleased with the work ethics provided by Davis Automotive. Richard M.