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HOMESERVICE MANUALSGMC1998CAB & CHASSIS C2500, 5.7 KREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 249 (CRUISE CONTROL SYSTEM)PROGRAMMINGPOWERTRAIN CONTROL MODULEOFF-BOARD PROGRAMMING
1998 GMC Cab & Chassis C2500, 5.7 K

Off-Board Programming

1998 GMC Cab & Chassis C2500, 5.7 KSECTION Off-Board Programming
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  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, and 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. 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.

    1. Normal

      This type of programming is for updating an existing calibration or programming a new controller.

    2. Vehicle Configuration Index (VCI)

      This selection is used if the vehicle VIN is unavailable or not recognized by the Techline terminal. You will need to contact the Techline Customer Support center to use this option.

    3. Reconfigure

      This is to reconfigure a vehicle, such as tire size and axle ratio changes.
  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 your 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. NOTE: Do not turn off the off-board programming adapter if the programming procedure is interrupted or unsuccessful. Ensure that the control module and the off-board programming adapter connections are secure, and ensure that 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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