On the MyChevrolet/OnStar iPhone app, when you bring up the Navigation screen and tap on the search dialog box, one of the options it shows is 'Find a Charge Station'. Touch on that and it shows, in my case sitting at home, the nearest ten or so public J-1772 sites. Pick one and it can send it to Apple map (which can be projected from the phone via CarPlay), Turn-by-Turn, or the in-dash Nav system. (The in-dash Nav is an option on the Volt, but not the Bolt EV.) I'd assume the Android version of the app is similar.