Yes, you can unlock your car with the OnStar app. The OnStar app is a powerful tool that allows users to control their vehicles from virtually anywhere. With the OnStar app, users can start their cars remotely, lock and unlock doors, get real-time diagnostics about their vehicle’s performance and even access roadside assistance services such as emergency fuel delivery or tire changing help. Unlocking your car with the OnStar app is easy too! All you need to do is open the mobile application on your phone and tap on “Remote Services” followed by “Unlock Vehicle” in order to gain entry into your car without having to fumble around for keys. Thanks to this convenient feature of the OnStar app, you no longer have to worry about being locked out of your vehicle or wasting time searching for lost keys!