The factory service manuals have been provided by TechAuthority for many years. Unfortunately, though, they no longer print the paper manuals so all you can get is a CD. More unfortunately, the CD is no longer a PDF of the printed manuals, it is a web-based manual that requires Internet Explorer and it totally sucks. No table of contents, no index, no searching, lots and lots of clicking and clicking and clicking to get to whatever you are interested in. And no wiring diagrams. Other than the missing wiring diagrams, it has the same information as the older factory service manuals. It is just much harder to use. That and the other manuals (diagnostics, body, etc) are no longer available. But that's what is available without a subscription. I don't know what you get different with a subscription