This may (or may not) help in your situation, but hopefully it'll help someone "along the way"....
BAL cables are "notorious" for breaking. Many people carry a spare cable, some even carry a pair of cables. They are very easy to change out, even for someone with "all thumbs"... On many RV's, there is a decal above the slide, hidden by the fascia, that outlines adjustment and routing of the cables. It's almost like following a "road map" to route the cables properly.
How much? Amazon sells the BAL cable kit for $20 (with free Prime shipping) so it's almost always cheaper (and faster) to replace a broken cable "on site" than it is to even pay for the gas/diesel to tow it to the dealership (unless you live next door)...
Here's the cable:
http://www.amazon.com/BAL-22305-Cabl...V+slide+cables
And you can find links to BAL's slideout mechanism online as well as a number of "Youtube" videos on what to do and how to do it.....
Good Luck !!!