i am new to using forums and not sure what i need to do i am looking for help on my 2011 Silverado. had an l20 4.8 replaced with 99 5.3 changed out trigger wheel on crank. went with ls2 front cover and gear. 585 lift cam. truck runs and drives i have played with the tune a little and figured out that i have no clue what i am doing truck does not run bad but can tell its not right and i hate the way it hunts at idle never know what its going to sound like. if i run the a/c it will shove the tuck threw stop lights stock converter i read therw the forums and i am more confused now thank for the help