I swapped out my radio unit that died with 1 that I purchased on EBay. I contacted the local dealer and gave him the VIN# of the truck it was pulled from for a code. The dealer gave me a '5' digit number instead of the usual 4 to enter but I think it's not right. I get the 4 dashes and then 'Code In' but when I enter the 4th digit it goes back to the 4 dashes which I believe means it's the wrong code. Does anyone have any suggestions or options to correct this? Thanks for any help in advance.