I have a spare sensor too. I haven't been able to find one anywhere, so I've kinda been holding onto this spare one just in case mine goes bad. With the way my luck is going, mine will quit working the day after I sell the spare...

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Another part I can't seem to find at any of the parts stores is the fuel level sending units. I just replaced mine today with the ones from my parts truck. The front tank can be done without even removing or dropping the tank, but the rear tank is a PITA. I'll pull the bed next time.