GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 TrailBlazer - 4WD 🢒 Body and Accessories 🢒 Theft Deterrent - Immobilizer - Some Export Vehicles 🢒 Theft Deterrent Module Replacement

Removal Procedure

    Caution: Refer to SIR Caution in the Preface section.


    Object Number: 1246121 Size: SH
  1. Disable the SIR system. Refer to SIR Disabling and Enabling in SIR.
  2. Remove the trim covers. Refer to Steering Column Trim Covers Replacement in Steering Wheel and Column.
  3. Remove the wire harness straps from the wire harness.
  4. Disconnect the connector from the theft deterrent control module.
  5. Remove the theft deterrent control module.

Installation Procedure

    Object Number: 1246121 Size: SH
  1. Install the theft deterrent control module.
  2. Connect the connector from the theft deterrent control module.
  3. Install new wire harness straps to the wire harness assembly.
  4. Install the trim covers. Refer to Steering Column Trim Covers Replacement in Steering Wheel and Column.
  5. Enable the SIR system. Refer to SIR Disabling and Enabling in SIR.