GM Service Manual Online
For 1990-2009 cars only

Inputs-Theft Deterrent Module

    • B+: Battery positive voltage feed for system operation.
    • IGN1: Determines ignition switch status.
    • GND: Ground feed for system operation.

Outputs-Theft Deterrent Module

    • Fuel Enable Signal: Interface with the Powertrain Control Module (PCM) for sending discreet requests for engine fuel enable/disable.
    • SECURITY Indicator Control: Direct ground control of the SECURITY indicator located in the instrument panel cluster.
    • Serial Data (Bi-Directional): Transfer of diagnostic information to/from a scan tool connected to the Data Link Connector (DLC).