I have recently bought a 2005 Grand Prix V6 non supercharged.
It overheats at idle and in park. I have had my head gasket and head resurfaced at Pepboys and replaced my radiator with a larger 1 inch thick radiator. The thermostat was also with a new OEM one. Bled and burped my cooling system. No leaks anywhere. Bypassed the heater and capped the hosses. The car still wants to climb to the red. It has Dextron 50/50 and has been flushed. Both fans kick on with a good amount of breeze.
How can I troubleshoot my cooling system to discover what the issue might be with the continued overheating?