
This interface allows you to retain OnStar functionality when you replace your factory radio, so you can have your cake and eat it too.
Q: Is there another wiring harness that you sell that would work to install my new OnStar mirror?
A: We do not make any parts to add OnStar to a vehicle.
A: This interface is intended to be used to retain OnStar when installing an aftermarket radio, it cannot be used to add OnStar to a vehicle.