PAC OS2-GM32 OnStar Interface (For 2000 - 2005 Cadillac Bose Vehicles): * Replaces factory radio in 2003 - 2006 GM SUVs and trucks while retaining OnStar * Plug and play, no cutting or splicing into factory plug * Pacos2/Pacos2Bose communicate directly with the OnStar module to prevent false * Triggering and eliminating unwanted audio noise * On-board amplifier will drive two 4W speakers in stereo * Use with the existing factory speakers or external speakers * For 2000 - 2005 Cadillac Deville, Seville and DTS * Also fits 2000 - 2002 El Dorado, with or without Bose amplifier