Plug and Play Interface Allows Replacement of a GM Class II factory stereo Maintain operation of the OnStar system, Bose amplifier and speakers Allows Audio from the OnStar system to play through the two front factory speakers when OnStar is active. Retains Vehicle Parking Assist chimes Retains warning chimes '00 - '02 Eldorado '00 - 05 Deville/Seville
