EFI Live has been proven to be the very best upgrade you can make. Very nice choice Sir on the truck. Even though I am a Cummins guy (1999,2006,1995), I have to admit that I have had my doors blown off of me by many a Duramax. I would start saving up for new injectors. The common rail injectors are delicate and sensitive and don't last as long as the old mechanical injectors.