2011 Avalanche. I replaced the stock with an Alpine. Bought the wiring harness that doesn't support factory chimes. (I prefer not having them.) Everything went well but it has a static noise when on. You can turn it up and not hear it but if the radio is on and there is nothing playing it's quite loud. It is not affected by engine RPM. Any ideas? I'm close to just ripping out all the stock stuff and running all new wires and speakers.