To answer your question, we need to know the model of your Hyundai. There are 2 very different V6 engines used in that model year, in different Hyundai models.
Reply to Steve7654's Post: It's the 2.7L
The thermostat on the 2.7 is located under the water outlet on the front of the engine. I have provided you the only diagram from the service manual showing thermostat location to help you in replacing it.
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