I just got my 04 F250 Diesel back from the dealer after shelling out $5100 for head gaskets. The dealer also replaced the batteries while it was there. Now my CD player won't work. I called the dealer and he said it's nothing that they did and I'd have to bring it in. Does anybody know if this is an easy fix problem? Is the radio tied into the engine management like on a VW that could have been messed up when they did my gaskets? It was working fine BEFORE I took it to the dealer. It has 6 CDs in it but says NO CD when I try to play them. When I try to LOAD it says CD ERROR and does nothing when I try to EJECT. WTF. I'd rather not spend more money on a new CD player. Any of you techs out there know something the dealer may have done that may have caused this. The head gaskets blew within about three months of getting the coolant system flushed on the truck. It's turning into a series of unfortunate (for me) and expensive coincidences with this dealer.