Theft system question! '98 Help Meeee

Okay. 1998 Malibu LS. Car starts fine. Runs fine. But now after driving for about a minute the theft system light in the dash comes on and won't go off. It dosen't shut the car off. Just the darn light. Any ideas of where to look would be greatly appreciated. Thanks

Do you have a Theft System Light on your dashboard when you're driving?

Yes. It's just the light on in the dash while I'm driving. It doesn't shut the car off or do anything else.

My wife's '98 just started this also.

I have a 98 malibu and the theft system will not turn off when the car is turn on or off. I;'s driving me crazy. It's also drainning by car battery. Can anyone give me some help in this area PLEASE?