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Home >> GMC >> 2001 >> Sierra 2500 HD, 2D Pickup, 6.6 1, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.6L - Repair Instructions >> Repair Instructions >> Engine Control Module Programming Procedure (Off-Board) >> Off-Board Programming

Off-Board Programming

  1. Obtain the VIN of the vehicle for which the control module is being programmed.
  2. Select Service Programming with the Techline™ terminal.
  3. Select Tech 2™, Reprogram ECU, and Off-Board Programming Adapter as the ECU location.
  4. Connect the control module, Off-Board Programming Adapter, and the Tech 2™ as described on the Techline™ terminal. Ensure you use the correct harness connector from the Off-Board Programming Adapter kit.
  5. Select Service Programming Request Information function with the Tech 2™. The Tech 2™ communicates with the control module and receives the access code.
  6. Exit the Service Programming Request Information with the Tech 2™.
  7. Disconnect the Tech 2™ from the Off-Board Programming Adapter.
  8. Connect the Tech 2™ to the Techline™ terminal.
  9. Turn ON the Tech 2™.
  10. Enter the VIN of the vehicle that will be receiving the control module with the Techline™ terminal.
  11. The Techline™ terminal will display the message, attaching to database.
  12. Identify what type of programming that you are performing.
  13. Select the appropriate calibration file.
  14. Ensure all connections are secure.
  15. The Techline™ terminal displays a summary screen that summarizes your selections. After confirming you choices, the Techline™ terminal automatically loads the calibration files to the Tech 2™.
  16. After the download is complete, turn OFF the Tech 2™.
  17. Disconnect the Tech 2™ from the Techline™ terminal.
  18. Connect the Tech 2™ to the Off-Board Programming Adapter.
  19. Select Service Programming With the Tech 2™ .
    20. IMPORTANT:

    DO NOT turn OFF the Off-Board Programming Adapter if the programming procedure is interrupted or unsuccessful. Ensure the control module and the Off-Board Programming Adapter connections are secure and the Techline™ operating software is up to date. Attempt to reprogram the control module. If the control module cannot be programmed, replace the control module. Refer to Engine Control Module Replacement .

  20. Select Program With the Tech 2™.
  21. After the download is complete, exit Service Programming.
  22. Turn OFF the Off-Board Programming Adapter.
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