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GMC Tech 2 - Page 115

GMC Tech 2
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SECTION VIIC SERVICE PROGRAMMING SYSTEM
2005 Tech 2 User’s Guide VII - 65
18. After programming is complete, toggle the J-45211 switch off, and wait until the green LEDs turn off
before continuing or disconnecting any connectors.
19. Turn off the Tech 2 and disconnect it from the J-45211.
20. Disconnect the J-45211 from the PCM.
21. Disconnect the power clips from the vehicle battery terminals.
22. Reconnect the vehicle harness connectors to the PCM and reinstall PCM.
23. Connect the Tech 2 to the DLC connector under the instrument panel, and start the engine.
24. Turn the Tech 2 on, “build” the vehicle, and select Diagnostic Circuit Check, then Clear All DTCs.
Note: This will clear all DTCs in all control modules simultaneously.
25. If the Service Engine Soon light comes back on after clearing DTCs, another problem may be present
or a CKP System Variation Learn Procedure may need to be performed. Follow existing service
manual procedures.
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