My buddy just got a 95 or 97 ls, i am not sure what he told me, but it has the factory alarm, did the factory alarm have an ignition cut, so if it is going off, you can not start it. He said he cut the wires on it or something, but now he cant start the car. Everytime he put a jump pack on the car, to start it, the alarm would go off, that is why he disabled the alarm.