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.

The T4TA Auxiliary Wireless Communication Interface Antenna requires a clear line of sight to the sky to operate properly. The T4TA Auxiliary Wireless Communication Interface Antenna may have limited, intermittent, or no reception near tall buildings or inside structures.