I have an 05 Cobalt Base Edition. I am posting this thread in hopes to find a solution for my Cobalt's security issue. Whenever I open the door the security light flashes but no alarm. Also, sometimes when I initially start the car my door locks lock and unlock on their own. This gets annoying as it continues to do it while I am driving periodically. Why is it doing this and what can I do to fix it?

 

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