Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!

lml retuning

  1. EFI Live
    Hey everyone. I have a 2012 LML with emissions compliant tunes. I just purchased EFI Live tunes I was curious if there are any issues flashing the ECM with the new tunes when I already have tunes? I asked the guy I purchased it all from and he said it would just take one more step while...