Is there a way to use a slave Sony CD changer (CDX-636) with GM - Chevrolet 2000

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factory radio? Is there a way (with an adapter or converter) to use a slave Sony CD changer (CDX-636) with GM - Chevrolet 2000 factory radio? I sold my old car. Took out the Sony CD changer and XM tuner but let them have the Sony receiver. I didnt find out until later that the units I have are "slave" to Sony receivers. Does anyone know a way to connect them to GM-Chevy factory receivers. I want to avoid getting brand new units. Looking for adapter, converter, cords, plugs, wires, etc. HELP!!!