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OnStar™ Radio Replacement Interface Module (SONGM-11) by Crux®. For General Motors Class 2 Vehicles with Bose Amplified & Non-Amplified Systems. The CRUX SONGM-11 is designed to allow for the installation of after-market radios while retaining OnStar functionality with Bose Amplified & Non-Amplified Systems, while also retaining Chime & Accessory features in a wide range of General Motors Class II Data-bus vehicles.