Seems I hit some nerves out there. Are you GM engineers? I am only telling you what I was told. As far as the coolant that all was suppose to have been checked and rechecked. The duct lines were also checked. As far as it freezing I am just passing along info from I was told . Two different stories. I am not impressed with this machine nor the response I have gotten from GM. AS far as the Engineers goes well the dealer sends a report to GM an it is in the report that this is normal operation for the Acadia and Traverse per their Engineers. The last words in the report state " Working to Manufactures Specifications". I questioned GM on how they sell these in the south but got no response.