I did both the trans cooler lines on my 2010, and it was a pain and I wouldnt DIY it again, I'd just pay someone with a lift. I bought the oil cooler lines too but never got around to doing them before I sold the truck. You have to pull the axle to do the oil cooler lines (at least on the NNBS), which is why I never did it. I still have the lines sitting in my garage taking up space. These lines are prone to leaking, and my oil cooler lines started weeping at about 50k on my 2010 and I sold it with 90k with no worse leaking, so I wouldn't worry about it totally failing on you anytime soon.