Need help with part

[weasle]

I recently picked up a 1986 Silverado K10 and I need help with a part. I believe its the coolant temperature sensor but when I look up the part, the new one doesn't look like what I have. My connector only has one wire and the new ones have 2 wires. Was this part updated by Chevrolet at some point or am I looking for the wrong part?







Here is my old sensor that I pulled out. The prong(s) were brittle and broke off. When I look at RockAuto and other places they look like this one:
https://www.rockauto.com/info/182/NTKEF0074__ra_p.jpg



And since we all like pictures