Your factory stereo is an integral part of your vehicles safety and warning chime system. If the stereo is removed without the Safety / Warning Chime System Interface installed, various warning chimes and some functions of your vehicle may be lost.Specifications: WARNING CA Proposition 65 Yes WARNING CA Proposition 65 Message WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov Description_DES Safety / Warning Chime System Interface Description_EXT Safety / Warning Chime System Interface; Warning Chimes; Security / Alarm Systems; +12V Accessory; Description_FAB Data Driven 12V Accessory Output with R.A.P. Description_FAB VSS Speed Pulse Description_FAB Parking Break Description_FAB Reverse Description_FAB Illumination Description_FAB Retains All Safety And Warning Chimes For GM Platforms Description_FAB Retains Steering Wheel Control Functions Description_MKT Your factory stereo is an integral part of your vehicles safety and warning chime system. If the stereo is removed without the Safety / Warning Chime System Interface installed, various warning chimes and some functions of your vehicle may be lost. Description_SHO RadioModInt