Chevrolet Malibu MAXX 05 Alarm goes on with no reason! Cannot figure out t what is going on. That is happening randomly when I leave car parked outside, never but when it is unlocked or operational.

What can I do to investigate the problem?!

In addition when I press unlocks but makes 3 beeps as well. Strange, mey be it is related to the alarm problem may be not.

 

Any electrical add on's since new, could be a BCM glitch, it controls a mess of things.

 

Probably a door latch either not closing all the way, or a bad door ajar switch in the latch.

 

Thank you for reply! theoretically it can be 6 doors with a problem, need to find one.

Is it possible to reboot BCM, just in case it glitchy ?

Is it possible to turns alarm system off but keep car locked?