alarm goes off by itself

Alarm is Autopage RS727LCD. Vehicle is 2007 Chevy Silverado Classic. Every night, between 1:30 and 3:30 my alarm goes off by itself. This is several hours after the alarm has been set. It is sending a signal to my remote that the shock sensor is setting it off. Any ideas what could be causing this? Thanks.

How did you hook up the door trigger on the truck?~The Rookie~

Rookie of the year that is...

Don't let the smoke out of your equiptment..it doesn't go back in.

^Dome light^..... I should add that the alarm has worked fine for the six plus months it has been installed. This problem just started recently.

how many nights in a row...Sure someone(neighbor) is not throwing something at it ...waiting for the night you get sick of it and leave it un-armed...Ive seen several cars that this happens w/ door trigger and vehicle sends voltage to see if you left a door open...we install alot of autopage stuff...never seen the shock sensor false...is alarm just giving warn-away chirps...or full triggerM.E.C.P & First-Class

Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!

It was happening at my house and my GFs house. It was a full trigger. I reset the alarm to the factory settings and it has worked fine since. Just a glitch I suppose. Thanks for your reply though. I will post again if it should happen again.