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Home >> GMC >> 2001 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Controls - 4.3L - Repair Instructions) >> Repair Instructions >> Powertrain Control Module Programming (Off-Board) >> Off-Board Programming

Off-Board Programming

WARNING: This page is about a different variant/trim than selected.
  1. Obtain the VIN of the vehicle for which the control module is being programmed.
  2. With the Techline® terminal, select Service Programming.
  3. Select Tech 2®, Reprogram ECU, and Off-Board Programming Adapter as the electronic control unit (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. With the Tech 2®, select Service Programming Request Information function. The Tech 2® communicates with the control module and receives the access code.
  6. With the Tech 2®, exit the Service Programming Request Information.
  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. With the Techline® terminal, enter the VIN of the vehicle that will be receiving the control module.
  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. With the Tech 2®, select Service Programming.
    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.

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