I have a 2006 GMC 3500 dually 4wd LLY automatic 6 speed with the manual shift option bought it completely stock recently put a 5" magnaflow straight pipe exhaust on it along with a 3" mbrp down pipe and a bully dog gt tuner future plans include egr delete up pipes custom y bridge and intake runners along with a 68mm turbo and upgrade the intercooler and radiator and efi live this is my second diesel my first was a 1992 Chevy 2500 with the 6.5 non turbo and I wish I never got rid of it I look forward to the discussions on here