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.
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HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISGENERAL INFORMATIONRESET PROCEDURESPROGRAMMING AND SETUPREPAIR INSTRUCTIONSK73 TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE: PROGRAMMING AND SETUP (UI3)REPLACE AND PROGRAM CONTROL MODULE OR REPROGRAM CONTROL MODULE
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol
Replace and Program Control Module or Reprogram Control Module
2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Replace and Program Control Module or Reprogram Control Module
To program a replacement or an existing control module, perform the following procedure:
- Access the Service Programming System (SPS) and follow the on-screen instructions.
- In the SPS Supported Controllers screen, select K73 Telematics Communication Interface Control Module Programming and Service Activation and follow the on-screen instructions.
- At the end of programming, choose the "Clear All DTCs" function on the SPS screen.
- Ensure the ignition is ON and the vehicle has not moved for at least one minute.
- Press and hold the TEST button on the telematics communication interface keypad assembly for at least 4 sec.
- You will hear "Emergency call system test in progress", then follow the audible instructions.
- Upon completion perform 3 ignition cycles.
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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.