GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2001 🢒 Catera 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Theft Deterrent Module Replacement

Removal Procedure
  1. Disable the supplemental inflatable restraint (SIR) system. Refer to Disabling the SIR System in SIR.
  2. Remove the screw covers from the upper steering column shroud.
  3. Remove the screws from the upper steering column shroud.
  4. Remove the upper steering column shroud.
  5. Carefully unscrew the steering wheel tilt lever from the tilt mechanism.
  6. Remove the rubber protective cover from the lock cylinder.
  7. Remove the screws from the lower steering column shroud.
  8. Remove the lower steering column shroud.

    9. Object Number: 160857 Size: SH
  9. Grasp the theft deterrent module (1) and pull off of the ignition lock cylinder housing. You do NOT have to remove the ignition lock cylinder first.
  10. Remove the wiring harness connector from the immobilizer control module.

Installation Procedure
  1. Install the wiring harness connector to the immobilizer control module.

    2. Object Number: 160857 Size: SH
  2. Install the theft deterrent module (1) and snap in place.
  3. Install the lower steering column shroud.

    4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the screws to the lower steering column shroud.

    5. Tighten
    Tighten the screws to 3 N·m (27 lb in).

  5. Install the rubber protective cover to the lock cylinder.
  6. Use medium strength locking compound GM P/N 12345382 or equivalent in order to coat the steering wheel tilt lever.
  7. Install the steering wheel tilt lever.
  8. Install the upper steering column shroud.
  9. Install the screws to the upper steering column shroud.

    10. Tighten
    Tighten the screws to 3 N·m (27 lb in).

  10. Install the screw covers to the upper steering column shroud.
  11. Enable the SIR system. Refer to Enabling the SIR System in SIR.

    12. Important: The vehicle may not start and a DTC 13 may set if the module is not programmed properly.

    Program new immobilizers with the security code, engine type, key cylinder number and the VIN.

    U.S. dealers may obtain the security code and the key cylinder number from the vehicle invoice or by calling GM TRACS 2000 (1-800-433-6961). GM of Canada dealers can obtain the information from the vehicle invoice.

  12. Use the scan tool in order to program the immobilizer:
    13. 12.1. On the Immobilizer Menu of the scan tool, select F3: Special Functions.
    12.2. Select F4: Program Immobilizer.
    12.3. Follow the on-screen instructions.
  13. Use the scan tool to program the keys and relearn the ECM to the new immobilizer's frequency code.