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I took off the heat shield .... took out the wheel well cover ... can't find it... if anyone has any other pics or anything that might help please let me know..
If it is a late 04, you don't take the wheel liner out, just look below the hot side (metal) CAC (Charge Air Cooler) tube. You can also locate it by looking under the alternator and then over a bit (towards the firewall) - on the passenger side valve cover. As in the pic above it is close to the glow plug control module (GPCM).
If it is under the turbo, then you need to read the threads in the Tech folder on removing it (one thread is on removing it from underneath and one is on removing it from to top by first removing the degas bottle, then the FICM).
I don't know how else to help if that doesn't do it.
Look at this picture. From the front of the truck, look under your alternator. On the valve cover. See the little brown colored sensor right at the bottom of the picture. If that isn't there, it's under the turbo. Which you can see in the second picture. (which I got from here: Powerstroke 6.0L Technical Intro Manual )