Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Replace and Program Control Module
To program a replacement control module, perform the following procedure:
Begin with the vehicle in the vehicle OFF power mode. The Service Programming System will power mode the vehicle.
- Ignition/Vehicle OFF.
- Access the Service Programming System (SPS) and follow the on-screen instructions.
- Check and follow Preliminary Information or Technical Service Bulletins before programming. If control module software updates are available, in the SPS Supported Controllers screen, select K73 - Software Update and follow the on-screen instructions.NOTE:
Refer to and follow the Preliminary Information or Service Bulletin to successfully program this control module.
- To properly calibrate, activate and configure the control module, in the SPS Supported Controllers screen, select K73 Telematic Control Module - Programming and Service Activation and follow the on-screen instructions.
- Clear DTCs.
- Ignition/Vehicle ON.
- Press the OnStar® Blue Button to call OnStar®, inform the advisor a new module has been installed and to verify the module is fully configured, registered, and activated.
An OnStar® button press to the OnStar® call center is required to complete the module replacement procedure.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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