When outside the truck or trailer, select functionality of the in-vehicle trailering app is conveniently available in the phone companion app1, available with the myGMC mobile app on compatible Android™ and Apple® smartphones. The functions include:
1. Service availability, features and functionality are subject to limitations and vary by vehicle. In-Vehicle app functionality and features vary with vehicle equipment and trim level, and the connected vehicle services plan you are enrolled in. myGMC Mobile app available on select Apple® and Android devices. Device data connection required. See onstar.com for details and limitations.