i am new to the ls tuning where do i start i have a 2011 gmc 1500 it had a bad 5.3 engine dod lifter failure po kept driving it to it spun a rod bearing and also wiped out the mains aluminum block no good i have a gen4 6.0 vvt engine in the shop i changed it over to the 3 bolt cam and used a stage 2 cam and put it the truck truck fired rite only have a few codes for the 2 rear 02s which are not hooked up just the first 2 02s are hooked up it has po10 cam code also the truck runs great like it is but its running real rich and it will idle up high when i barely touch the gas pedal it goes up to 3000 rpm and then it slows down to idle but with the cam its loseing some vacum when i hit the brakes it wants to almost die down and quit running so i would like to know what do i need to do to learn how to start tuning my own truck i dont know what i need to buy to even start tuning i have 3 other trucks that have the 6.0 so i need to start some where