Coolant fan, start there. I had the 50 amp fuse go bad. Easy fix even if it is the fan. Here's my problem---How long has this been going on? If it was driven hot for a while----watch out!!!!! You do not want to go into this motor out of your pocket. It is not worth it---Have it checked out hard, and you may want to think TWICE on this one. ALL the parts could have been stressed due to the heat. Not even the dealer can not tell you how long this has been going on---Hell, they did not even know about!!!! BE CAREFUL!!!!!