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OFFBOARD Programming

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana Special, 2001 GMC Savana Camper Special, and 2001 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.
  1. Obtain VIN of the vehicle for which the control module is being programmed.
  2. Select Service Programming with Techline terminal.
  3. Select Tech 2, Program ECU, and Off-Board Programming Adapter as the electronic control unit (ECU) location.
  4. Connect control module, Off-Board Programming Adapter, and Tech 2 as described on Techline terminal.
  5. Select Service Programming Request Information function. Tech 2 communicates with the control module and receives access code.
  6. Exit Service Programming Request Information.
  7. Disconnect Tech 2 from 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.
  11. 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. Techline terminal displays a summary screen that summarizes your selections. After confirming choices, Techline terminal automatically loads the calibration files to the Tech 2.
  16. After download is complete, turn OFF the Tech 2.
  17. Disconnect Tech 2 from the Techline terminal
  18. Connect Tech 2 to Off-Board Programming Adapter.
  19. Select Service Programming.
    NOTE: DO NOT turn the Off-Board Programming Adapter OFF if the 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. Select Program with Tech 2.
  21. After the download is complete, exit Service Programming.
  22. Turn the Off-Board Programming Adapter OFF.
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