General Maintenance & Repairs - t/a heating up

so out of nowhere my trans am started to heat up with no leaks whatsoever...they told me start with the basic changing out the radiator cap which i did and it still heat up so i checked for the thermostat it might b stuck but it dont have one...any other ideas or things i can check for?? thanks


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Are the fans turning on? Are you overdue for a collant flush? Do you have enough collant? Is your plastic air dam still attached?