For an 05 Truck only one of those codes come up? What is the p# of the PCM???

It sounds like you have a wiring issue if supplying battery power to the fuel pump increases fuel psi from 10 to 55psi.

I would double the wiring connections you had to make. BTW A street and performance harness is most likely not built by s&p. You might want to try hotwireauto. The Squires most likely built the harness.

Just my

If you want PM me your cell, and I will trouble shoot over the phone.

Justin