Hi there,
The Workhorse part # for the serpentine belt is W0000581. I have crossed this into a Gates part # K061080 or Dayco 5061080. As far as other parts to keep on board traveling, I would recommend a fuel filter, air filter and spare spark plug wires or just upgrade to the Magnum wires and not worry about burning any. You can find any parts you need that are Workhorse specific on our website
Ultra RV Products. Just go into the Workhorse Parts section, select 2002 W22 and you can browse through all the different sections of parts that are applicable to your vehicle.
