Check the listing for details. Bose + Onstar GM Car Stereo Radio Install Wiring Harness Interface for Hummer. Color: Black, Condition: New. Listed at 129.99 USD. Radio Replacement Interface with Onstar Retention for Class II General Motors Vehicles "Install your GM car stereo radio with ease using the Bose + OnStar GM Car Stereo Radio Install Wiring Harness Interface designed for Hummer vehicles. This wiring harness interface provides a seamless integration with the Bose audio system and OnStar functionality, allowing you to enjoy enhanced audio quality and retain important features. Upgrade your Hummer's audio system with this reliable and convenient wiring harness interface."Retains the function of OnStar® when the factory radio is replaced. Generates all safety warning chimes. Rear Seat Entertainment activation Plug-in-connection for steering wheel control module (SWI-CP2 or SWI-RC) In-field updateable firmware via USB Chime Module Included, with 4 level adjustability Retains OnStar® when the factory radio is replaced Retains Bose amplified audio system (if equipped) Provides 10 Amp 12-volt accessory output Retains all safety warning chimes Navigation radio ready Maintains a “healthy” status on the Class II data bus Retains Rear Seat Radio Controls Retains Rear Seat Audio (connects to aftermarket radio AUX input) Plug-in installation for vehicles with 24-pin harness Compatible with Cadillac: 2003 - 2006 CADILLAC ESCALADE 2003 - 2006 CADILLAC ESCALADE ESV 2003 - 2006 CADILLAC ESCALADE EXT 004-2012GMCCANYON 2002-2009GMCENVOY 2003-2007GMCSAVANA 2003-2006GMCSIERRA 2007GMCSIERRACLASSIC—2003-2006GMCYUKON 2003-2006GMCYUKON XL 2003-2007HUMMERH2 2005-2010HUMMERH3 2009-2010HUMMERH3T 2001-2004OLDSMOBILEALERO 2002-2004OLDSMOBILEBRAVADA 2000-2004OLDSMOBILESILHOUETTE 2001-2005PONTIACGRAND AM 2004-2008PONTIACGRAND PRIX 2001-2006PONTIACMONTANA 2000-2005PONTIACSUNFIRE