Iím not sure if your Suncruiser has the same sound system as my Horizons DHS QSurround5.1 sound system. If it does, I used an impedence converter to interface my new Samsung TV to it. It required taking the back off the TV and splicing into the speakers to get it to work but that sounds harder than it actually was. After that it was plug and play.
02 Itasca Horizon 36LD, Cat 3126E, Allison MD3000MH
09 Colorado Z71 Ex Cab, SMI AF1, Demco Base Plate & Tow Bar.