Does a 1991 Chevrolet Cavalier have a car alarm?

[little_flower_of_god]

I woke up last night and thought I saw my friend's 1991 Chevy Cavalier's hazard lights flashing and horn beeping. She insists that her car doesn't have an alarm.
Does anyone own one of these that can tell me if they come with an alarm?
I don't think I'm going crazy, I saw what I saw, but she tried to set an alarm off herself and it didn't go off...