Hi everybody ,I would like to stack my bully dog power pup with my six gun.My question is do have to unplug my six gun to upload the power pup.thanks

I have never stacked before, but since the programmer is actually retuning the engine diagnostics at the source and a module changes the parameters down the line, I wouldn't think it's necessary. Let me know how this stack turns out. I hope you have transmission work done.