I need help guys... i have a 2002 LS and when my alarm goes off i cant hear the sound but i see the lights flashing. does anyone know if this is something taht i ajustable or maybe could have been unplugged and is there any trouble shooting tips you can offer?

Is it the factory system?

yea its the factory system

the siren module may have went out. Not familiar with the factory alarm setup.

Does your horn still work?

actually i havnt used the horn in a while but i tried it 2day and no it stopped working

That's your problem. The horn is your siren on this factory alarm setup.

how do i fix this?

do the buttons on the steering wheel work like the radio buttons and cruse control? If not could be the clockspring

Check the horn fuse in the front power distribution box at the front of the engine compartment, #4 fuse-20A.