Ok so were to start I picked up a 2008 silverado 2500hd ltz z71 4x4 crew cab long bed duramax (LMM from what i can tell) this truck will be for our family ranch and needs to have the power to recover stuck equipment and chase down livestock i came across a friend who had a Efi live flash scan v2 for a good price (just need to buy a vin lic for it) so i picked it up i am currently running a diablo trinity on it and it dose ok however with the idling for hrs at a time the def system clogs so i want to get rid of it and as this truck stays on PRIVET OWNED LAND AND ROADS at all times i see no problems with it as the laws read so i guess i just need some one to point out a good reliable place or person to make the tunes also passably add a 5 tune switch so its not always running in a heavy toe mode thank you for any help provided