Conditions for Setting the DTC
B2476 04
The telematics communication interface control module detects an open/high resistance on the Telematics Button Assembly supply voltage circuit.
B2482 and B2476 59
The telematics communication interface control module detects a valid signal on the Telematics Button Assembly signal circuit for longer than 15 seconds. If one of the OnStar® buttons is held or stuck for 15 seconds or greater, the telematics communication interface control module will set this DTC.