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 MANUALSCHEVROLET2000C TAHOE 2WD V8-5.7L VIN RREPAIR AND DIAGNOSISTESTING AND INSPECTIONPROGRAMMING AND RELEARNINGONSTAR - VCU OR VIU REPROGRAMMING
2000 Chevrolet C Tahoe 2WD V8-5.7L VIN R
OnStar - VCU or VIU Reprogramming
2000 Chevrolet C Tahoe 2WD V8-5.7L VIN RSECTION OnStar - VCU or VIU Reprogramming
VCU or VIU REPROGRAMMING
After replacement of the VCU or VIU, the OnStar system must be reprogrammed. This is accomplished by putting the ignition in the accessory position, pressing and holding the Call Answer/Call End Button for approximately 10 seconds until the telltail lamp illuminates red. The telltail lamp will remain red during the programming process then change to green when programming is completed.
After replacement of the VCU or VIU, the OnStar system must be reprogrammed. This is accomplished by putting the ignition in the accessory position, pressing and holding the Call Answer/Call End Button for approximately 10 seconds until the telltail lamp illuminates red. The telltail lamp will remain red during the programming process then change to green when programming is completed.
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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.