Final answer:
The customer should check the Uconnect settings to ensure message display is enabled, verify iPhone Bluetooth permissions, and adjust notifications settings. If problems persist, it could be a compatibility issue or technical problem requiring further troubleshooting.
Step-by-step explanation:
The best course of action for the customer who is having trouble with text messages not appearing on the Uconnect touchscreen is to check the Uconnect settings to ensure that the feature for message display is enabled. This is often an issue that can be resolved without having to replace the device or contact support. To do this, they would go into the settings menu on the Uconnect system, find the section for phone or Bluetooth connection settings, and ensure that the permissions for text message access are granted, and that notifications are turned on. Sometimes, it may also be necessary for the user to enable message notifications on their iPhone under the Bluetooth settings for the specific Uconnect device.
If the settings on both the Uconnect system and the iPhone are correct and text messages still do not appear, it could be due to a compatibility issue between the phone and the system, or a technical problem that may require additional troubleshooting, possibly with the assistance of Uconnect customer support or a dealership technician.