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Mystery plug

281 Views 4 Replies 5 Participants Last post by  3Wheelerguy
I am new to this site so I apologize if i am not great at explaining. My family has a 2008 Toyota Sienna that we replaced the radiator and thermostat on and we're still having problems. We think this unhooked plug (See below) but cannot figure out where it goes. If you need me to add more photos I can.
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