GM Man

So the wiring harness in my 89 is shot, damn mice had gotten to the car while it was in storage. Got an 88 harness getting ready to put it in, but the 88 harness doesnt have provisions for VATs so I'm trying to figure out what to do. I'm guessing that I'll need a chip that does not have VATs in it, but was just wondering if anyone else had any other ideas?? If a chip is the way to go, where would I get one?

Thanks..