Maybe you could type in exactly what it says so we can see context?
Generally, it's going to be unrelated to anything else and will mean tighten all bolts to stage 1 spec, then tighten all bolts to stage 2 spec, then tighten all bolts to stage 3 spec. (There's usually a pattern to follow as well.)
I think the access cover went away for maybe the '95 model year? Definitely long before '98, so yours shouldn't have had one from the factory.