Looking for some info here. I have an opportunity to get a 2012 6.2 l94 for a good price. I am wondering what all would need to be done to get it to run with the ECM. I currently have a flex fuel 5.3 with a built 4l60e 4x4. ECM is e38 that is currently in the vehicle. Can I use the same ECM with the engine or do I have to replace it? Thanks for any info in advance.