Or you can get them brand new fron Helm Pub. They publish the factory manuals. there is a link to there site in the Cadillac site. if you log on to the oweners center and it the glovebox link, where the online owners manual is. there is the optinion to purchase the service manual in hard copy or CD ROM
or you can subscribe to www.alldatadiy.com. They've scanned the factory manuals and indexed them. It's very easy to use but there are some details missing (things that most people would never need though).