See also:

Flash-to-Pass
To flash the high beams, pull the turn signal/lane change lever all the way toward you. Then release it. ...

OnStar Mobile App
With an iPhone® or Android™-based mobile device, an OnStar mobile app can be downloaded. The vehicle can be remote started, if equipped, or the doors can be unlocked from anywhere there ...

Flash-to-Pass
To flash the high beams, pull the turn signal/lane change lever toward you, and release. ...