Diagnostic Aids

It is not required to download an app to your device for Apple CarPlay.
It is recommended to use the device's factory provided USB cable. Aftermarket or third - party cables may not work.
NOTE:
Vehicles equipped with RPO PPW have wireless phone projection and it is not required to connect the device to the USB port.
Visit for a list of Apple CarPlay compatible apps. This does not guarantee the functionality of the app.
Before beginning diagnostics, if available verify Apply CarPlay works from the customers device on a like vehicle, meaning: Same year, same model, same radio RPO and same radio software level.
Applications use the mobile device and connection to a service provider to operate. Connection quality issues, or service provider data transmission issues can give the appearance of a vehicle malfunction.
NOTE:
Verify if the customer is using their cellular data plan or the vehicle's OnStar^® data plan.
Determine if the issue occurs in the same location or if it occurs in multiple locations.
Devices may lose wireless phone projection connectivity from the vehicle due to interference from external WiFi signals.
It is required for the device to be connected to the vehicle via Bluetooth and WiFi in order for wireless phone projection to operate.