Very strange chime/sound after start up. Vid attached
 

Hello,
I just recently purchased a 2014 GT and I'm loving it. I've had the car for about a week and now each time after starting the car, a very strange whistle/siren sound occurs shortly after the welcome "ding dong" chime sound stops. This only seems to occur after the car has been off for 15 - 20 mins or more, if I start it directly after turning it off it does not occur. It kind of sounds like some kind of warning chime, but I'm not getting any warning lights or check engine and the car runs fine. I'm taking it to the dealer on Saturday, but thought maybe someone else had come across the same issue and perhaps there was some kind of reset I could do? I seems like it's coming from somewhere under the dash on the driver said. Didn't do it when I drove it off the lot.

The sound occurs at the end of the video. Any feedback is appreciated.
Thanks,
Mike

That doesn't even sound like a factory component. Any warnings you would get from the car should be using the same chime you hear at startup.

Radar detector buried in the dash?

Sounds like aftermarket theft control. Cut that crap out if you find it.