I have a 2003 i need to replace the ecm on and I need to change the vin for skreem to communicate and to write the original tune file. any one know the best way to go about this? or is there any other way to erase then flash the ECM with the original file. I tired a to change the VIN with a scan tool and it wont take and I tired to change the skim module to the new vin and it wont take. any help would be greatly appreciated