I have a 1997 Pontiac Grand Am. It has antifreeze and the car runs However?

  • Thread starter Thread starter master_john_steed
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master_john_steed

When I went on a recent highway trip I watched the temp gauge go up and then go right back down to normal. I've never seen a car do that before and it got me a bit concerned. It was a 250 mile round trip. There is nothing leaking that I can see nothing causing the car to stop or lose power. Also it seems that I can only get heat in the car if it is running at max and it makes this horrible loud noise
 
sounds like a thermostat problem and a heater fan problem
 
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