Transmission pressure sensor???

Assuming an Automatic, it is on the passenger side toward the front of the transmission on the govenor housing (just back of the dipstick tube. It is a 7/16" headed plug.
On Manual, you have to remove the PTO cover and drill and tap for the sensor. You will lose all the oil so be ready.

There is a test port on the 47re that you can use. You need a reducer (I have it if you are interested you can have it). I tried the port & it didn't work to well for me. So I bought a B&M drain plug kit for the pan & screwed it in in place of the plug. Works good & cheap too. BTW, how loud is your straight pipe & how do you like your Edge Attitude.

Thanks for the info I will be looking at it this weekend and hopefully all will go well. I just realized I posted it as a transmission pressure instead of a temperture sensor...I also just got in a banks big head waste gate dump. they claim it will add about 7lbs of boost, currently I am topped out at 24.5lbs. The exhaust is killer, my buddy borrowed the truck last week and I could hear him from 4 blocks away :rck: I am getting ready to go 4" turbo back straight piped.