06 LLY to LBZ -ECM
 

Im thinking of getting a spare ecm to tune

If I were to get one for my 2006 lly, could it be programmed to a LBZ before I install it so its just plug n play? I plan on doing efi live once the funds permit.

I tried to get my local dealer to do a flash but he looked at me like I fell off the moon, and then begin to tell me it was a complete different motor than a lbz.