There is a pathfinder version of this truck which judging by the serial number and year of manufacture it will be.

Connect the truck and open pathfinder, select 350 model.

Across the bottom of the window will be "calibration" select this option and follow the on screen instructions.

Hi
I understand this is 350-03 series.

For this truck you should use Truck Doctor, not Pathfinder.
Hope you have it.

After replacing the pot, go with the following procedure:
- connect the notebook, depress the the brake pedal, key switch in the first position (the diodes on the indicator on),
- in Truck Doctor go to window 8,
- if evertything is OK , in the TrucDoc window will be displayed "OK",
- press enter and store.

If there's no "OK" on TucDoc window, manipulate the pot until you get OK in this window.

Good luck.

PS

I think this topic should be in Troubleshooting Forum.