Is the throttle body positioner adjustable? Should I just replace or adjust?

What is your question?

I was pricing parts and one site suggested checking and adjusting the voltage of the current throttle body positioner prior to replacement. If replaced these adjustments are still required. Other members suggested cleaning and dealing TBS. Son is taking truck 200 miles away to school. It had all the symptoms of a bad TBS. Want it running and safe before he leaves.