The installer didn't install a hood switch, your shock sensor is not properly set, the alarm does not have a perimeter sensing unit...that is extra...you can reach into any vehicle without this unit and take whatever you want with the windows down...az03sierra said:i got mine installed for $500. the problem is is im not seeing how it is worth that much. sure its got some nice features but when you can bounce all over the truck, get in with the windows down , open the hood and the alarm doesnt do a thing, somewhere in not seeing $500 worth. im still getting to know the alarm. is there any way to set the sensitivity? if so let me know.