I converted this truck from FS 22.
International S1800 Service Truck
This truck originally had a 5th wheel, which I removed to add a service bed and custom welder platform behind the cab.
This truck has tons of options for engine, bumper, exhaust accessories, lights, etc.
It has a service function, which is activated by going to the rear driver side toolbox and pressing M.
There are tensionbelts in the bed and the rear tailgate unfolds.
Full credits in the modDesc.

Credits:
Julian F. Modding, 82Studio, Richwoodrocket