It’s on the drivers side.. follow the fuel lines from the fuel tank at the rear of the truck. They run along the frame on the right side of the vehicle. The fuel filter is about mid-way on the truck you can’t miss it if you keep following the fuel lines . Wish I could go take a pic for you but I sold my U42T
Here’s the diagram of the fuel lines on a U42T, I circled the filter. I added a pic of a U42t fuel filter as well. Good luck
Thank you it just tried to crank the it just turns over like it’s not getting fuel it it and tried to start then it just turns over hope that’s it thanks
Check all your rubber fuel lines. These old trucks have old rubber and it starts to crack and leak lots of times. Have you tried pumping the gas peddle while you crank?
Changed plugs out and fired right up now I need to find some atv type tires for it it just has regular tires on it now but 6 ply