I think Les at the key center I linked to can decipher the lockset barcode into the necessary numbers. However, he was receiving the information from LR, so if Blackbox couldn't, he might not be able to either. If it is the original key, you shouldn't require it. That would be necessary solely in the event that the key came from a different vehicle and you possessed an unlocked BeCM in order to put the code into it. Can the Blackbox Lite (I use a Nanocom Evolution) verify the functionality of the door latch's microswitches? I'm not very well-versed in this product. The only thing that needs syncing is for the keyswitch and CDL switch in the door latch to be in reliable functioning order. If the key you're trying to use hasn't been used for a long time, it might have lost sync.