The power seat in my truck is partially nonfunctional. The back half of the seat lifts up and down but the front half does not, the motor still works and it makes kinda of a "Errrr" sound. Anyone know which part might be broken so I can replace it?

 

Sounds like the gear inside. Best way to find out what you need is to pull it apart and see.
https://www.genosgarage.com/category/seat-components