1993 Jimmy Keyless Entry

I have a 93 GMC Jimmy slt that the keyless entry unit just stopped working for no reason. I have changed the batteries in remotes and everything. I was wondering if there was a way to reprogram it back into the system. It is a GM factory part. The numbers on the remotes are:
p/n: 5955516
poc/mdc: 218 k1035
model/fcc id: abc01041

If those are any help. I have no idea what could be wrong.