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Works on most 2002 + earlier gm vehicles with bose system. Use os1boseWhen replacing factory radio with aftermarket radio to retain onstarFunctionality. Comes w/oem-1 premium sound system interface + an os1.Note: will not work with onstar equiped vehicles that have factoryRadio with rds (those radios will have an "rds" logo on the front faceOf the factory radio).
www.Pac-audio.Com for more information.