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What is the problem you are having with the truck?
On the drivers side of the fuel filter is the HPOP. It has 2 big lines coming off it, one to each head. On the rear of the HPOP, down low in the valley, is the IPR. It will have a 3/4" stamped steel nut on the back, a spacer, and then the IPR coil with a 2 wires. It is only a few inches away from the ICP sensor.
WHAT IS ,IPR,IPCSENSOR
IPR stands for Injection pressure regulator. IPC stands for injection pressure control.
What is the problem you are having with your truck?