I found out the hard way that the previous owner (or his/her mechanic) on my 1993 Jimmy (4.3L "W", 4WD) stripped the nut for the oil pan drain plug. I can't tighten it enough to stop it from leaking. I've tried an oversize bolt, and that hasn't worked either. Mama doesn't want me parking in the driveway and leaving oil spots, and I don't like parking in the street (bad experience 10 years ago when someone rear-ended my '69 Camaro). I think the only way to permanently fix this is to replace the oil pan. I know it's a hell of a lot easier with the engine pulled, but since this is my daily driver, I can't have it out of service for more than a weekend. Has anyone tried to replace the oil pan on a similar truck with the engine in? The Chilton's manual makes it sound like you have to unbolt everything but the spare tire to do it. Any feedback would be appreciated.