So I just purchased my first real truck. 99 2500. From what I can gather, the truck has a k&n intake with a big ol dry filter on it, turbo back, catless exhaust, edge comp tuner and an aftermarket lift pump. The truck has about 266k on it and from what I gather, the truck has been somewhat poorly maintained. I know the oil was just changed due to a receipt, but what are some things I should definitely make priority in looking into? I extended the crankcase vent tube, debating whether I'm going to put a collection bottle on or not. Suggestions? The front end definitely needs some love, theres about an inch of play each way in the steering wheel. Some specifics: what coolant is used on these? Power steering fluid? what viscousity oil is used in the diffs? Do you guys run a fuel cleaner on every tank? What specific oil brands do you suggest? Coolant looks nasty, any suggested brands, color? If there's something I'm missing, please throw it out there. Please no negativity, like I said, new to diesels.