Off-Board Programming

Before Programming a Control Module

NOTE: DO NOT program a control module unless you are directed by a service procedure or you are directed by a General Motors Corporation service bulletin. Programming a control module at any other time will not permanently correct a customer's concern. Off-Board Programming is used in situations where a control module must be programmed without having vehicle present. Off-Board Programming Adapter must be used to perform Off-Board Programming procedure. Adapter allows PCM to power up and allows Tech 2® to communicate with PCM. DO NOT disturb tool harnesses while programming. If an interruption occurs during programming procedure, programming failure or PCM damage may occur.
• Ensure all connections are secure.

Off-Board Programming

1. Obtain VIN of vehicle for which PCM is being programmed.
2. Using Techline® terminal, select SERVICE PROGRAMMING.
3. Select Tech 2®, Reprogram PCM, and Off-Board Programming Adapter as PCM location.
4. Connect PCM, Off-Board Programming Adapter, and Tech 2® as described on Techline® terminal. Ensure you use correct harness connector from Off-Board Programming Adapter kit.
5. Using Tech 2®, select SERVICE PROGRAMMING REQUEST INFORMATION function. Tech 2® communicates with PCM and receives access code.
6. Using Tech 2®, exit SERVICE PROGRAMMING REQUEST INFORMATION.
7. Disconnect Tech 2® from Off-Board Programming Adapter.
8. Connect Tech 2® to Techline® terminal.
9. Turn Tech 2® on.
10. Using Techline® terminal, enter VIN of vehicle that will be receiving PCM.
11. Techline® terminal will display message, attaching to database.
12. Identify what type of programming you are performing.
13. Select appropriate calibration file.
14. Ensure all connections are secure.
15. Techline® terminal displays a summary screen that summarizes your selections. After confirming you choices, Techline® terminal automatically loads calibration files to Tech 2®.
16. After download is complete, turn Tech 2® off.
17. Disconnect Tech 2® from Techline® terminal.
18. Connect Tech 2® to Off-Board Programming Adapter.
19. Using Tech 2®, select SERVICE PROGRAMMING.
NOTE: DO NOT turn off Off-Board Programming Adapter if programming procedure is interrupted or unsuccessful. Ensure PCM and Off-Board Programming Adapter connections are secure and Techline® operating software is up to date. Attempt to reprogram PCM. If control module cannot be programmed, replace control module.
20. Using Tech 2®, select PROGRAM.
21. After download is complete, exit SERVICE PROGRAMMING.
22. Turn off Off-Board Programming Adapter.