Metra Gm Class II Data Interface (Gmrc01)

Class II data interface: Add an aftermarket radio to your later model GM vehicle and retain the factory options. Certain safety features such as the door, headlight and ignition chimes run through the factory radio with class II systems. With this interf... Read More

Class II data interface: Add an aftermarket radio to your later model GM vehicle and retain the factory options. Certain safety features such as the door, headlight and ignition chimes run through the factory radio with class II systems. With this interface you can remove the factory radio and still retain the chimes when you install a new radio.... Short description