Metra BY-CH01-SWC aftermarket radio data interface wiring harness for select Buick/ Cadillac/ Chevrolet/ GMC/ Hummer/ Pontiac/ Saturn 2006-up models. When replacing the OEM radio with an after market radio some features are lost with Metra’s BY-CH01-SWC interface most of those features get retained. This interface with connect an aftermarket radio to the OEM vehicle and communicate with the data system. This interface will provide and retain 12 volt accessory power, provide navigation outputs, retain chimes, retain steering wheel controls and retain balance and fade. This interface will work in non-amplified models.