2006 Chevrolet Cobalt SS, 4D Sedan, StandardFACTORY OEM SERVICE PROCEDURE

Theft Deterrent Control Module Replacement Using Existing Keys

If the theft deterrent control module is replaced using the existing vehicle keys, the following procedures must be performed:

IMPORTANT: Because of how vehicle key information and theft deterrent passwords are stored within the theft deterrent module (TDM), the Set Up a New Theft Deterrent Module procedure must be performed prior to the removal and replacement of the TDM if the vehicle keys are being reused. Performing the setup procedure first allows the scan tool to extract the key information and passwords from the old TDM prior to its removal. Failure to perform this step will result in the failure to learn the existing vehicle keys and new vehicle keys will be required when replacing the TDM.
  1. Set up a new TDM using existing keys. Refer to Programming Theft Deterrent System Components . This step will retrieve key information from the original TDM and write this information to the replacement TDM.
  2. 10-minute Relearn Procedure. Refer to Programming Theft Deterrent System Components . Use the VTD Learn for LE5 or LZ9 Powertrain System calibration with this step. This step will allow the engine control module (ECM) to learn the replacement TDMs incoming fuel continue password.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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