2000 Blazer Alarm Problem

I have a 2000 chevy blazer that recently started having a problem with the alarm. The alarm will go off for no reason. This has happened both in the garage and out so I cannot blame it on the weather. Does anyone have any ideas what the cause is? I tried reprogramming the remote to see if it solved the problem but the still goes off.

The alarm does not constantly go off it is intermitent (sp?)

Is there any way to disconnect the alarm?

Is it factory or add on?
Some alarms are sensitive to electrical interference.
High power lines?
CB and other radio transmitters.
Cell phones and wirless computers and exc.
Does it only do it at your home or other places?