I have a 2005 6.0 and it has been nothing but problems since day one. It is a nice truck to drive when it is working but it hardly ever works! There has been over $40K worth of mechanical repairs in the last 20 months from two turbos, all eight injectors, two Fuel Injection Control Modules, three EGR coolers, two EGR valves, two cylinder heads, Head Gasket replaced three times, rear end, power steering pump, and the list goes on......
There is a fix, you HAVE to purchase and EGR delete kit but if you have emmisions testing in your area you will have to remove it before the test. Also the head studs need to be replaced with ARP head studs that have a much higher tensile strength than stock. The stock head studs are not strong and cause the cylinder head to warp if you do any heavy towing. The studs themselves are about $600 but it will cost about $3500.00 to $4000.00 to have them installed.
i would of gotten rid of before i put half that into it