Originally Posted by
az3579
The LCM and Instrument Cluster are the redundant sources - they sync that info with each other. If they're both new, then the dealer is right. You'd have to code them manually, which they won't do for legal reasons.
I know the two sync the mileage if one of them has the correct VIN and a mileage programmed in it and the other has a 0 mileage, but I'm not sure if the VIN would transfer to a new LCM just like that - I think the VIN has to be programmed, and the mileage syncs up automatically.
Either way, some manual work has to be done in this scenario. I would start by coding the VIN and mileage to the LCM using PASoft and then seeing if the cluster pulls the information from the LCM on its own.