Radio Controls
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
The HUD receives a message from the radio through the E+C serial data line. The HUD will display the radio station or the CD track for approximately 3 seconds after the radio station or CD track has been changed. If the radio information does not display then there is a problem with the E+C serial data line.