Hi, I am new to this forum and really joined because I just got a new 2017 GT and I noticed that when I am done driving and shut the car off and jusy sit in the car I noticed the turn signals and rear brake lights flash about every 5 seconds. I was just interested if anyone knew why. I haven't noticed it happening every time but every once in a while. It doesn't seem to cause anything but it's weird. I'm thinking it might be caused because the car has its alarm set but won't go off because it sense the key is still in the car. I also do have some extra alarm system that the dealer said I should get. Thanks in advance for any information.