Niki,
NAPA has the rebuild kits which include 2 pins and 4 bushings for around $9. For the life of me, I couldn't get the pin to come out. I tried a hammer and punch and then a pneumatic hammer with a blunt tip and only ended up damaging the pin and part of the hinge. I returned the kit to NAPA for a refund. Gave in and went to the dealer and $71 later changed the whole assembly. Only the lower hinge and the bottom portion bushing on the pin was bad on mine causing the door to sag. Took less than 10 minutes to R&R the lower hinge assembly. I'm only sharing my experience as your's may or may not readily come apart and may just be easier to change the whole hinge.
Aloha,
Matt