Pontiac Grand Am GT: have a 2003 pontiac
my name is XXXXX XXXXX have a 2003 pontiac grand am gt, V-6 ENGINE, with 55k miles on it,,,,,,my question is about the cooling system,,,,, everything seems to be ok but i have a few questions 1) i have always noticed, especially in summer, the temp guage would go up to about 210 to 215 then come back to normal which is about 200 degrees. 2) this past winter, the thermostat was stuck closed, the guage would only get to about 180 or so,,,,, the thermostat was not opening and i wasnt getting the proper heat in the car,,,,, i had the thermostat replaced,,, everything was fine,, the heat inside was good again,,, the temp guage would get to about 200 then hold steady there,,,, remember - this was during the cold weather months. now, with the warmer weather, here is what i am getting on the temp guage. 1) at about 200 degrees, the thermostat seems to be opening fine and on the colder mornings, i am getting good heat inside the car with no problem ( AND THE AC IS BLOWING COLD TOO WHE...