My apologies, we just moved and most of our things are still packed and the warranty info is in one of those boxes.. Here is the link for cornerstone..
Did the dealer tell you in writing that it was an as is sale? Did they represent that there was a factory warranty left? If they made any of these claims in writing then you should have no problem returning the coach for a full refund.. Unless there are no more problems with it, then I would keep it and enjoy especially if you got a good deal.. If you did then you would need to weigh the benefits of buying a brand new coach with a warranty VS getting a really good deal on a coach without one.. Good luck I hope all works out for you.. These coaches are a blast to have..