In my quest to obtain an updated ECM PROM for my 89, I ordered an E-PROM for an 88 in error. It was special order & non returnable (DUH). It is the latest update (ANCX) for the 1988 Reatta. AC Delco part #16123488 (Brand New). I did get a good price, List is $87.80. I paid $48.29. Anyone in need, please PM me. You can have it for what I paid for it.
Next time, I Won't Jump The Gun!!!