alarm .. signal light and passenger door

[gtatransam88]

recently i started to notice something strange in my gto 2006

i noticed that the security lock blink after 30 seconds from locking or unlocking the car and stays on even after i start the engine i have to click unlock the key again to let it go. i

also sometimes the left signal light lights up and freezes on .. until i keep trying several times locking and unlocking the car and it disappear.

last thing the passenger door sometimes doesn't open from outside .. i have lock the door manually and unlock it and using the inside handle so it will open.


so .. are these three things related ?? what do i need to check or fix?

help please