I have a 95 Chevy Corisca........6 cyl. It only has 60000 miles on it. The temperature guage would go way past the half way mark and slowey go over to hot. I had the thermostat replaced. It did it again today and this time I turned the heater on but when that didn't work I turned the ignition off. It took a couple of times turning the car off and letting it sit and then it was fine. It seems that the guage only goes over to hot when you first start driving it. Once I start the car again the guage is fine. This is when I am using the ac. I have had the mechanic check about everything and they cannot find out why it is doing this. Anyone have any ideas?????
Thank You