Have 04 grandam gt car when started heats up normal then sometimes car go to full heat light comes on blows cold air play with heater controls temp goes down and starts blowing hot air but not all tim

Asked by Mar 23, 2015 at 08:17 PM about the 2004 Pontiac Grand Am GT Coupe

Question type: Maintenance & Repair

And no leaks anywere and oil is fine
no signs of coolant in it

2 Answers

58,265

Check the thermostat,and make sure your radiator fan,s are working right,if fan,s and thermostat good,check your water pump.

Also only does it when its cold outside

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