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Hello,are you having this problem only after draining and refilling the cooling system? Do you have good heater output if you turn the heater on? Does the ac fan run on low and high speeds? Do you have access to a scan tool/any warning lights on? Will the fan come on by itself if the ac is off and the engine starts to run hot? It will start to overheat after a few minutes of idling?
Ok so it only overheats while driving down the road for awhile when the ac is on?
Ok, if the fan is working on both high and low speeds but still running hot especially while driving then its either a blockage between the radiator and ac condensor. Check for any dirt, grass, leaves or debris in between this area and clean it out and recheck. If its clean then I would suspect a restricted radiator internally. if you have a digital temperature probe when the engine is off you can check the temperature across the face of the radiator. it should be the same across it. A 10 degree cooler temp is towards the bottom of the radiator. if you see a drastic temperature difference or feel a cold spot with your hand when it is hot, the radiator needs to be replaced. SInce its running hot, it would be a good idea to replace the thermostat also.