GM Service Manual Online
For 1990-2009 cars only

The theft deterrent system on this vehicle is comprised of two separate systems, the vehicle theft deterrent (VTD) system and the optional content theft deterrent (CTD) system. VTD, prevents drive away theft by keeping the vehicle from starting. CTD is the vehicle alarm system which discourages unauthorized entry into the vehicle. These systems are described and diagnosed separately within this section.

Theft System Indicators

SECURITY

The instrument panel cluster (IPC) illuminates the SECURITY indicator as determined by the vehicle theft deterrent (VTD) system and the content theft deterrent (CTD) system. The IPC receives a class 2 message from the theft deterrent controller module or the rear integration module (RIM) requesting illumination.

    • The VTD system requests the IPC to illuminate the indicator only when the ignition switch is ON. The VTD system uses the indicator as a malfunction indicator.
    • The CTD system requests the IPC to illuminate the indicator only when the ignition switch is OFF. The CTD system uses the indicator in order to identify system status.
    • The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.

SERVICE THEFT SYSTEM - 34

The IPC illuminates the SERVICE THEFT SYSTEM - 34 indicator in the driver information center (DIC) when the theft deterrent module sets an DTC. The IPC receives a class 2 message from the theft deterrent module requesting illumination.

STARTING DISABLED/REMOVE KEY - 33

The IPC illuminates the STARTING DISABLED/REMOVE KEY - 33 indicator in the DIC when the theft deterrent system has disabled the starting system. The IPC receives a class 2 message from the theft deterrent module requesting illumination.

THEFT ATTEMPTED - 40

The IPC illuminates the THEFT ATTEMPTED - 40 indicator in the DIC when the theft deterrent system has detected a theft attempt. The IPC receives a class 2 message from the RIM requesting illumination.

Keyless Entry System (w/AU0)

The keyless entry system functions interact with the content theft deterrent system but is diagnosed as a stand-alone system. Refer to Keyless Entry System Description and Operation in Keyless Entry.

Radio with Theftlock

The theft deterrent system does not interact with radio theft lock equipped vehicles. Radio theft lock is diagnosed as a stand-alone system. Refer to Radio/Audio System Description and Operation in Entertainment.

CTD/VTD Description and Operation

    • For content theft deterrent (CTD) information, refer to Content Theft Deterrent (CTD) Description and Operation .
    • For vehicle theft deterrent (VTD) information, refer to Vehicle Theft Deterrent (VTD) Description and Operation .