OK! so my truck alarm wont stop randomly going off, there is no set time. Today it went off twice once around noon then again at 330. I've had numerous complaints from my neighbors saying it goes off at least 2 times every night. Could anyone help me to figure out why this may be happening? yes i have checked to make sure no one is around it when it happens.....

I have a 2013 Ford F-150

 

Is this a factory or aftermarket alarm?