When replacing the OEM radio some features may be lost. This interface will retain those features and also provide Navigation outputs when adding an aftermarket Navigation radio. This interface will also retain steering wheel control functions as long as the aftermarket radio is steering wheel control capable. this interface works in General Motors 2014-up. Retains balance, backup camera, warning chimes and OnStar(R) andRetains factory 3.5mm AUX-IN jack in select Gm 2014-up with the MOST amplified system