2005 chevy malibu antithef system

I have a 2005 Chevy Malibu has all kind of electrical problems, Battery drains just over night, when I open the door the alarm system goes off, when I disconnect battery and connect it the trunk opens by itself. I don't know if all these problems are related? Does any body have the same problems and thank you for you help.
Asked Sep 03, 2017

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