My search on that part number came up with the same info that it's a high speed radio..
I have heard that oemautopartsco.com will repair and return mygig radios, but I can't personally vouch for them as I've never used them..
I'm running through my mind what could cause this, but coming up blank. When I did mine, I was surprised on how easy it was for the hookup, even though I had things that I had to get and install. Like the Combo roof antenna and the cable for the mirror.. The radio played AM/FM and Sirius immediately when I plugged it in.
Still interested to know what is wrong, so keep me updated.
2009 Dodge Ram 1500 Sport Deep Water Blue Crew Cab Hemi 4x4