OFFBOARD Programming

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 GMC Savana Special, 2001 GMC Savana Camper Special, 2001 GMC Savana, 2001 Chevrolet RV Cutaway, and 2001 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Obtain the VIN of the vehicle for which the control module is being programmed.
Select Service Programming with the Techline terminal.
Turn ignition switch to RUN position.
Select Tech 2, Reprogram ECU, and Off-Board Programming Adapter as the electronic control unit (ECU) location.
With the Tech 2, select Service Programming Request Information function. Tech 2 communicates with the control module and receives the access code.
With the Tech 2, exit the Service Programming Request Information.
Disconnect the Tech 2 from the Off-Board Programming Adapter.
Connect the Tech 2 to the Techline terminal.
Turn the Tech 2 ON.
With the Techline terminal, enter the VIN of the vehicle that will be receiving the control module.
The Techline terminal will display the message, attaching to database.
Identify what type of programming you are performing.
Select appropriate calibration file.
Ensure all connections are secure.
The Techline terminal displays a summary screen that summarizes your selections. After confirming you choices, Techline terminal automatically loads the calibration files to the Tech 2.
After the download is complete, turn the Tech 2 OFF.
Disconnect the Tech 2 from the Techline terminal.
Connect the Tech 2 to the Off-Board Programming Adapter.
With the Tech 2, select Service Programming.
With the Tech 2, select Program.
After the download is complete, exit Service Programming.
Turn OFF the Off-Board Programming Adapter.