http://www.grandprixforums.net/pcm-pinouts-46260.html

98 and 99 are identical. Take the 97 and map out the locations versus the 99 and find the differences. Then move the 97's wires to match the 99 pinout. Like I said..there's about 10 to move. If you label them and move..you are all set. It's super easy to move wires in the connectors.