Amazon Echo and its more portable siblings are wonderful tools to bring into your smart home. You can control a variety of devices with them. As jryanishere has shared on YouTube, it is possible to use the device to start a GM car.
The developer has been using his Echo to control various smart home devices, so the next natural step was to try to control a car with it. You can check his blog to find out more about this project and how you can pull it off for your own car.