We are setting up a 2016 L83 5.3 in an older vehicle. The owner did not get the ecm with the engine so we are going to get him one. My understanding is all the 2016s have the high lever super-duper encryption (I've dealt with a 2017 so I am familiar with it) but I was hoping to avoid it. So here are my questions:

Do all the 2016 e92 ecms have the same encryption as the 2017s?

Will a 2015 e92 work in place of the 2016 with no adverse affects?

Obviously we will be flashing the ecm to run in its new vehicle, just making sure there wasn't any difference as far as the sensors or harness that I am not aware of yet. Hopefully the only difference between 15 and 16 is the encryption and I can get a 15 ecm and make life easier and cheaper for everyone. Thanks!