Hello I'm Trey from Iowa. Just bought an 05 lly yesterday from local dealership. Have no intensions on using the truck other than pulling a few small trailers here and there. Mainly just to drive for fun. I asked the dealership what had all been done to the truck and all he said was it was mainly stock other than exhaust. Well I opened the hood and seen a k&n cold air intake. So I could tell right away the guy was just lookin to sell the truck. My question was, what are some things to check over to assure she's not gunna bust down anytime soon, and what do you all suggest I use for fluids?