Almost every issue in every thread for the CTD is emission related. Countless members having DPF/DEF/EGR/Exhaust sensor issues. Who will step up to the plate with a tune and exhaust system? I know multiple performance companies post here and also sponsor this site. Please, for the love of humanity help us out! GM makes the best diesel truck motor available and ive never had any issues with my 07.5 newer trucks after deletes. Please save us from the EPA!!!!!