Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

The navigation radio must detect a power mode transition to ON.
The radio does not set this DTC if B1327 or B1328 is current.
The vehicle must drive for 4 km (2.5 mi) after receiving a global positioning system (GPS) signal.