Ok so one of the barriers to buying a chip/programmer is that they are not in compliance with California SMOG

laws. I hate it too... Anyway I need to know if the FU leaves a latent "footprint" that will get me in trouble at the dreaded smog check station? If not what is the procedure to return the truck to stock after removing the chip? I have heard all sorts of voodoo on how to do this...

Thanks
Dave