Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
You can buy a new one here for $200 and it includes all of the relays and fuses.
Key 2, part # **787553, Description BLOCK BODY WRG HARN JUNC,(INCLS 1,11-18)
It don't look to difficult to replace. I would say about 1 hour.