Too high! Check the coolant level and make sure the cooling fan is working. It is probably time for a cooling system service.
Just got it out the shop yesterday and they did a diagnostic test and said nothing's wrong with a new coolant cap
I recommend a full cooling system service - flush, hoses, new coolant etc. Oh and find another shop.
You may want to upgrade your radiator to a heavy duty aluminum unit and a really good cooling fan. https://www.mishimoto.com/mishimoto-chevrolet-camaro-aluminum- radiator.html
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