Factory alarm?

Does anybody here know if they 1998 lumina came with any kind of car alarm or antitheft device from the factory? My stock radio ( before i put in my cd player) had a antitheft warning on it, or something to that effect.

Nope. Some have VATS on the keys but it won't make the horn go nuts or anything. The flashing light you refer to is on the radio itself. You can program them to lock up if disconnected.