Metra AZ-INGM2 aftermarket radio data interface for select Generl Motors 2006-2021 models. When replacing the OEM radio with an aftermarket radio some features are lost, with Metra's AZ-INGM2 interface those features are 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 in select Buick/ Cadillac/ Chevrolet/ GMC/ Hummer/ Pontiac/ Saturn 2006-up