OBD Scanner

Get yourself a red brick snap on, they were the best back then I believe the newest update was to 08. Should be able to scarf one up fairly cheap now a days.... I have a snap on Solus ultra now. Cost me too many thousands.
Bach in 01 my first red brick cost me something $3gs....
And people wonder why I'm putting together a couple of 80s carbureted trucks ... I'm tired of computer modules, and paying all the time for updates to keep up at work.
Get something you can work on with a screwdriver and all those SAE tools I'm sure you have that are collecting dust. That you've already spent the money on years ago