Need Help/Advice

I drive a 97 GTP, I've noticed when driving my battery light goes on and off at random times, along with RPM's jumping and D.I.C. turning itself off whenever it feels like it and back on, Usually at highway speeds but it does this really just whenever it feels like it, sometimes a drive is fine with no issues, I had my altenator and battery checked, what should I get tested next? Also I have to get an inspection done soon :banghead:

you probably have an ignition switch/harness issue, common on these cars. Check the tips and maintenance section at the top of the Grand Prix forums for a detailed write-up.