IAT sensor

Its in the air inlet duct, two wire connector, I would not do this though, all you bought was a 20 cent resistor to trick the computer into thinking its getting colder air than it is.

Without getting into the logistics all it does is waste fuel, its crap , you would do better if you pulled the airbox out and cut the hole in the front bigger, it works better than any so called called air intake or mod chip because it actually pulls colder air, the cold air intakes for the engines suck hot air from the engine not from outside, ive proven it and I also have a throttle body mod I do which helps a bunch and you actually gain fuel mileage and hp and costs nothing to do, I should finish the tutorial I started for these two mods and sell those, at least you wouldnt get ripped off
i have done probably close to a hundred 4.3 engines and veryone leaving smoking the tires when they wouldnt do it when they came in

either way good luck

jim