Diagnostic Aids
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
- It is not required to download an app to your device for Apple CarPlay.
- If wireless phone projection is not an option it is recommended to use the device's factory provided USB cable. Aftermarket or third - party cables may not work.
- 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.