I had the fuel pump replaced with a NAPA replacement. Ever since I drove the truck out of the garage the fuel level indicator will not stop shaking and I cannot get rid of a PO452 code.

Any help????

Well the vapor pressure sensor signal input is low according to the PCM.
Most all off the ones that I have seen it is a faulty sensor, or wiring to the sensor.
The sensor is mounted on the fuel pump module on the gas tank. It is like a map sensor, must have it for evap system testing & operation.

I had the fuel pump replaced with a NAPA replacement. Ever since I drove the truck out of the garage the fuel level indicator will not stop shaking and I cannot get rid of a PO452 code.

Any help????
Welcome to AF, sounds like something was left off or possibly damaged when the tank was down.

Thank you for all the info. When the new fuel pump was installed they did not properly install the fuel pressure switch. It is all better now.