pcm swap
Gotta return the old pcm back to stock which will unlock the tuner. Then if the pcm is a different p/n a new tune will need to be written
If you bought through Hemifever, I have no doubt he'll be able to help you with unlocking the SCT and switching over to the replacement. I would also be sure to run the PCM numbers through him on the replacement B4 you buy it, just to make sure it is one that is supported by SCT.



