Yukon XL 2500 2WD V8-8.1L VIN G (2004)
Conditions for Running the DTC
Ignition is in RUN or ACC position
System voltage is between 9.5 - 15.5 volts.
The above conditions are met for more than 1 second.
Conditions for Setting the DTC
The VCIM does not detect the presence of a cellular antenna for more than 1 second.
Action Taken When the DTC Sets
The vehicle is unable to connect to the OnStar(R) Call Center.
The OnStar(R) status LED turns red.
Conditions for Clearing the DTC
The VCIM detects the presence of a cellular antenna.
A history DTC clears after 50 malfunction-free ignition cycles.
Circuit/System Testing
Perform a visual inspection as shown above in order to verify that the cellular antenna and the cellular antenna coupling assembly are not damaged. If
any components are damaged replace the assembly.
DTC B2476 or B2482
DTC Descriptors