Hey guys, I just have a short question. Where is the oil pressure sending unit (-switch) located on the 8.1 vortec engine? I was looking at it and i think that its right by the oil filter location but it only has one wire. The one that i saw on the internet has a three wire connector so that doesnt work. Im staying at a hotel right now so its hard for me to look at it without getting dirty but i was thinking on the back of the engine on top is where they are normally located on a chevy.