GMC Terrain display issue with radio and navigation screen not functioning, no sound from turn signals on GMC Terrain

Some GMC Terrain owners report experiencing display issues with the radio and navigation screen, including a black screen and non-functional touch screen. These problems can hinder access to navigation, entertainment, and essential vehicle information. Additionally, some owners find that the absence of sound from turn signals may be linked to these display malfunctions. Common causes for these issues include a blown fuse, loose or corroded wiring, or problems with the radio unit itself. Some owners have successfully resolved minor glitches by performing a reset on the radio system or checking for system updates. If these issues persist, it may be necessary to follow a step-by-step troubleshooting process to identify and rectify the underlying problems.