Can gm see if youve ever swapped out your pcm if you swap it back to the original one? Just want to see if this is an option for getting tuned but keeping my warranty

 

Does zzp do good tuning? They tune for the maf relocate but they only do it for the maf sensor in the lower pipe mine is relocated to the upper pipe(thats where dejon likes to put it). I wonder if that would still work.

 

GM can tell when you've done a battery reset, but that's about it. There's no "warranty tape" on the ECM to tell that you've removed it. You shouldn't be getting warranty work you don't deserve, either, but we've already beaten that dead horse on this site, many times.