Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle will not start.
The TDM sends the fuel disable message via the serial data circuit to the ECM.
The TDM will run the VIN Timer for a programmable length of time, typically 10 minutes.
The TDM sends a message to the IPC to illuminate the SECURITY indicator.