ouch!
This happened to me a while back... it is NOT FUN!!
Can you pull the cable out from inside the cab, or does it just pull like normal, maybe easier, and not do anything? If you can pull a section of cable out completely, then it broke and "all" you have to do is locate the cable ahead of the break, probably above the inner fender on the driver's side, and cut the housing, pull on the cable with a pair of pliers...
On mine, the end of the cable had just slipped out of the slot, so the cable was not broken, it just didn't connect to anything!! I tried all kinds of things, including removing the grill and trying to reach it from there. I finally gave up and unbolted the inner fender on the driver's side, dropped it down, removed wires and things attached to it, pulled the inner fender out, and then squeezed myself up in there until i could reach the mechanism and pull it. Nothing like getting intimate with your engine like that
(Mine's a 4x4 with a bit o lift, so there is plenty of space over the tire. ) It was very uncomfortable, and a hell of a reach. I had to use a pair of pliers, because I couldn't quite reach it well enough to get a good grip on it. Afterwards, I adjusted it and put a couple of tie-wraps around it so that wouldn't happen again!!
Shouldn't be any problem to buy a new cable and install it, if the cable itself snapped.
Jack