First things first check the fluid level. Besides that there are a lot of transmissions at a you pull it junk yard. I would go on ebay and buy a rebuilt one for cheap and send yours in. Again its hard to tell without looking at it, or a mechanic look...
Like the last guy said, it's just a difference in trim level. At the very least, you could get a Chevelle, a Chevelle Malibu, or a Chevelle SS. Even then there different trim options within the levels. I know the exterior stainless trim is involved. ...
Remember Jame's Taylors' song "I've seen fire, I've seen rain"? Of coures he is using poetic license and means lightning and rain (you can't see thunder) . Consider this when you first notice a storm you will hear thunder first, then later notice mor...