Anti-Theft System: Description
WARNING:
Deactivate air bag system before performing any service operation. See AIR BAG RESTRAINT SYSTEM article. DO NOT apply electrical power to any component on steering column without first deactivating air bag system. Air bag may deploy.
The PASSLOCK(R) system is designed to prevent vehicle theft by disabling the engine, unless a mechanical key is used to correctly engage and rotate the PASSLOCK(R) lock cylinder. System components include ignition switch, PASSLOCK(R) lock cylinder, PASSLOCK(R) Sensor, Truck Body Control (TBC) module and Powertrain Control Module (PCM)/Vehicle Control Module (VCM).