Yep, an EPA thing. Was hoping our new president could drain the EPA swamp, but it seems they have more power than the president. I should have kept my old duramax. I didn't know my EFILive would be pretty useless for my new truck. When you cannot delete the DPF and then when you change tune files you can mess up emission sensors and get CEL easily. You will likely burn more fuel because of regeneration more often. EFILive was great for the old Duramax. Well, there is one thing I can still do, and that is to raise the speed limiter limit speed to beyond what the truck can do.

Cheers