When you push the unlock button once, it unlocks the driver's door only. Push it a second time and it unlocks the whole car. Push the trunk release button for about 2 - 3 seconds and the trunk swings open. Push the lock button once for all doors to lock. Push it a second time and it turns off your healights. Push and hold the lock button for about 2 - 3 seconds and your alarm goes off. Okay...the only way i have succesfully been able to set my alarm off, is when i have the car locked and the windows are down and i try to unluck the car by flipping the switch on the door manually...my car was vandalized and windsheild shattered but alarm didn't go off....taht's all i know about the stock alarm! hope it helps.