The car has an original GM GoodWrench alarm from way back in 1992. I have no idea how the thing works, when I arm it and unarm it the lights flash and the alarm beeps but when I tried to get in with the windows down NO alarm goes off.... And to top it off there is an alarm button under the dash and a switch of some kind too, I have no idea what all this is for.

Do you think I would be better off going to a brand name alarm system with shock sensor? Id want remote start later, so this would probably be the best option right?