“DO I NEED THIS FOR NEW AUDIO INSTALLATION ON A 2016 SILVERADO? NO STEERING WHEEL CONTROLS, NO ONSTAR, NO NAVIGATION. I JUAT WANT TO SWAP OUT HEAD UNITS & REALLY DONT WANT TO BUY UNNECESSARY TECH.”
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This interface is required to replace the factory radio in a 2016 Silverado, even without the features you listed. There is no accessory/ignition power in the factory harness. The interface uses the vehicle's data network to provide accessory power to the radio and retain the factory warning chimes that are routed thru the factory radio.
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