Keyless Entry for a 96 Chev Impala

My remote control door lock receiver (RCDLR) doesn’t work in my 96 Chevy Impala. GM doesn’t make the part any more, and Impalas are hind to find in local junkyards.

Can I get the old one repaired ? If I can get another one, how do I calibrate it to my key fobs ?

Programming is through the grounding of pin “K” in the data link connector. I have also seen a seperate wire in the trunk (near the antenna) that eithe gets grounded or if there are two conductors you touch them together.