Originally Posted by Chris54
I purchased a new temp sensor for it and discovered when I went to replace it that I could not find it on the engine.
Welcome to the site!
The IAT sensor is actually 'built into' the MAF sensor on your truck.
Your MAF connector (C128) should have 6 wires - only the inner four deal with the MAF function. Pins #1 & #6 are the leads for the intake air temperature sensor.
Pin #1 = 20 AWG - Grey w/ Red Stripe
Pin #6 = 20 AWG - Grey