I believe that yours doesn't work, and the fact that mine does doesn't surprise me, one bit.I installed the PPE egr false code eliminator and my egr block off plate and got a 401 code the next day. So I say it doesen't work. I reset the code and took out the block off plate, now no codes.
I know this may be completely irrelevant, however, I am also using the powerpup in the ECON mode (I guess you could call it level 2).I soldered all the connections and checked the wiring twice. I called PPE and they told me that it might not work with a block off plate. They said that it will just work with a exhaust. They said that the egr needs some kind of exhaust readings even with the code eliminator. It doesen't make much sense to just have a exhaust without a block off plate, and have all that dirty exhaust going back into the motor. They said that GM tightened all the parameters on all the new pickups.