I have a three wire, 1 power, 2 going to the sending unit. the sending unit was already in the new tank when we got the truck, took it out tested it with an ohm meter seems to work fine. I just wanted to make sure that did not need to be "matched" I've also read that the price of chickens teeth has come down since Biden took office its the unobtamiom parts that have skyrocketed LOL side not I yesterday I shipped to D&R restorations for them to check it over & hopefully fix it since I've read they are so delicate my fat fingers would surly f--- it up