REPLACING GM MODULES: HOW TO HANDLE SECURITY PIN CODES? Replacing a used GM module involves more than just installing the hardware. If the PIN codes are not properly synchronized, the programming may fail, or the vehicle’s immobilizer system may block communication. Technical Procedure: ✅ Step 1 – Retrieve Both VINs Use DPS to read the VIN from the replacement module and obtain the VIN of the original vehicle. These details are required to determine the corresponding PIN codes. ✅ Step 2 – Enter the PIN Codes Enter the PIN stored in the used module as "Security Code 1," and the target vehicle's PIN as "Security Code 2," following the applicable programming procedure. ✅ Step 3 – Select the Correct Calibration File Prepare the appropriate calibration file for the specific module and vehicle configuration before beginning the programming process. ✅ Step 4 – Initiate Programming Click "Program" and allow the process to complete. The PIN synchronization/programming procedure typically takes about 12 minutes. Do no