PAC OS-2X OnStar(R) Interface (OS-2X for Select GM(R) Class II Vehicles with or without Bose(R) Sound System)Radio replacement interface with OnStar(R) retention for select GM(R) Class II vehicles with or without Bose(R) sound system Rear seat entertainment activation Provides plug in connection for SWI module (sold separately) No steering wheel button mapping required In field updateable firmware via USB using PAC UP Retains OnStar(R) when the factory radio is replaced Retains Bose(R) amplified audio system, if equipped Provides 10A 12V accessory output