ok today i was thinking about the s-series and what they meant, what i came up with was the following:
sc = sports coupe makes sence
sw = sport wagon ok sure
sl = hmm sport luxury? i dont think thats what that is. im renaming my sl2 to ss2

can be translated into a number of things
super saturn2
sport sedan2
super sedan2
sorry for the stupidity, just thought id share it, maybe get a laugh out of it.