Getting my chevrolet to lock the doors

I am not sure of the best way to go about this: I would love for a bed time routine to lock the doors of my truck. The vehicle is a newer Chevy so it does work with the my Chevrolet skill from Alexa. I guess I could use a text to speech and get it to ask Alexa to lock the truck but it then requires a pin, this seems awkward and cumbersome.

I was wondering if any one has done something similar? I don’t really want to modify a key fob. Is there a better solution?