Hello all! So I just bought a new to me truck, 2010 Silverado LTZ with the 5.3. I had one before this one so I was familiar with the truck and loved it, so I got a newer one that was nicer with less miles. I've had this one about a month and it's started leaking oil. I didn't buy and "warranty" or coverage on the vehicle from getting screwed on my last vehicle, so it is going to be me or my mechanic fixing it if it needs something significant. I noticed the oil leak about a week before writing this, so I went up to AutoZone, bought all new Castrol GTX oil, new K&N oil filter (only type I run), and some Lucas Oil engine oil stop leak (I heard it was good stuff). I cleaned the underside of the truck really good the day before, I changed the oil, and I look under the truck a few days later and it's still leaking the same amount and same places it was before. It's blowing on the sway bar when I drive so it's hard to tell where it's coming from. I've seen drops hanging off the transmission service cap, dripping off the oil drain plug, splashed on the bell housing (not really dripping from there, just looks like residue), and the place where the oil pan area and the bell housing meet (not the bell housing itself, but that area). Some of the areas that look dry and have been known to be problem spots are the oil filter, oil pan gasket (the front 3/4 of the pan are bone dry on mine, just the back part towards the rear of the truck), and the cooler block plate (don't really know what this is, but it's behind the starter and I read on some forums to check it and it appears dry, BUT I'M NOT RULING THIS OUT BECAUSE IDK WHAT IT IS). It's dripping very slightly, only a few little drips a day, but I want it fixed. I've read where it could be the rear main, the oil pan gasket, the rear cover gasket (not sure what this is either), and maybe as simple as a bad washer on the oil drain plug (getting one of those soon). The truck has 118k miles on it and I'm just wondering if I'm missing something. I'm by no means a mechanic, but I read forums a lot for advice and I'm definitely YouTube certified Any help would be appreciated, I just hope it's something I can do myself. If not, that is ok too. I don't have pictures of the truck as I am on my desktop, so I tried to be as descriptive as possible. Thanks and God bless!