DTC Descriptors

WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

DTC B3120: Keyless Entry Antenna 2 Short to Ground
DTC B3120: Keyless Entry Antenna 2 High Voltage/Open

For symptom byte information, refer to Symptom Byte List .