So here is the deal...i need a nelson tune so i have to sell my Predator programmer. the tuners are said to work on silverados, corvettes, and some other chevy vehicles within the year but diablo sport didn't make a 98 chevy programmer so i was wondering if that year earlier would work. A 98 vette with a 99 tuner. My friend has a 98 vette and he would buy it off of me if it worked but we don't really want the pcm to go to S#!T.