EZ Lynk will freeze at 99% and fail when trying to load a file onto a vehicle that needs an unlock file to be loaded or an unlock cable to be installed to be able to load any other files first.
Below on those scenarios:
2010 - 2012 6.7L Cummins - A PreECM Unlock file must be loaded first. It will either be names PRE-ECM UNLOCK or ECM UNLOCK.
2013-2017 6.7L Cummins Cab Chassis - A PreECM Unlock file must be loaded first. It will either be names PRE-ECM UNLOCK or ECM UNLOCK.
2018 6.7L Cummins with 2.0 EZ Lynk (Serial Numbers starts with a 'B') - You will either need the EZ Lynk Cummins Unlock cable that came with your device installed. OR you can install the GDP68000U cable and load your file.
*NOTE: If your vehicle is a Cab Chassis, you will also need to load the PREECM UNLOCK File as well
2018 6.7L Cummins with 3.0 EZ Lynk (Serial Numbers starts with a 'C') - You will need to install the GDP68000U cable and load your file.
*NOTE: If your vehicle is a Cab Chassis, you will also need to load the PREECM UNLOCK File as well
2019-2021 6.7L Cummins - You will need to install the GDP68000U cable and load your file.