So basically if dealer flashes the 2021 ECM you WILL be locked out or will possibly be locked out?
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Is there a way to check if the Boot Signature has been updated without trying to flash the ECM?
So the option is to use a 19-21 for a 22 Cummins flashed with the calibration and VIN of the 22. Will this work and is there anything else that needs to be programmed to get it to work?
Bit more to it then that unfortunately. Need few extra things to make security happy etc. If its 68rfe truck will need converter pi curve programmed as well. Any 19-21 file will work as well with enough messing around. my 22 runs efi CSP5.
Correct