I have a '95 and if its the intermediate cable then its simple as can be. took me 3 minutes and a pair of vice grips or pliers. the cable runs just below the drivers side on the outside of the frame. if your snapped then you can see where it is hanging. use the pliers to "open" the front clip a little, slide out cable, go to the back and swing the cable so it lines up with the big hole and comes loose.
re-install by clipping the front first and squeeze the clip back over the cable end, then grab the back connector and pull it towards the front - you may have to pull hard. hook the cable back in reverse of the way you removed it. get in the truck, step on the parking brake pedal so it tightens, release and you're all set.
i don't know if 94s have an adjustment screw or not, i know the 95s and up have a self-tightening adjuster in the pedal. so don't stomp it to the floor (like i did) break the cable.