I purchased a 2012 Traverse (private sale) and did not realize that the fans were not kicking on. Drove it home (approximately 28.5 miles) for my friend to park my other car and to leave again. Traverse started overheating. Parked it and had a guy who does my car repairs look at it and he thought I might have blown the head or intake valves but was not sure. My brother (who was a mechanic before he had health issues) pressure tested the car and said that the head seems to be good and all the coolant was coming out of a heating hose below the air box. We tested the relay and fuses and they are good, so what could be the other possible reasons my fans are not kicking on? Thank you in advance.