Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

The theft deterrent control module sends the fuel disable message via the serial data circuit to the powertrain control module (PCM).
The vehicle will not start.
The theft deterrent control module sends a message via the serial data circuit to the instrument cluster to illuminate the SECRUITY indicator.