I currently have an aftermarket radio wired directly into the car and bypassing the ribbon cable connector
is there an antenna adapter i can get for this or does it come with the harness adapter, or is it something i can get relatively easily?
the adapter you want is actually made for Volkswagons. Best Buy might carry it? I bought mine online for $10. http://www.tune-town.com/Cars/stuff/...ile_Aurora.htm
Don't quote me on this just yet. I need to install my cd player yet then I'll confirm for sure that this will fit. If it fits my car, it'll also fit your Bonneville.