Hopefully it was just a bad juice module.
I would recommend throwing a good volt meter on your truck, and see exactly where your voltage is, and run it for a few minutes to see if you see a spike anywhere over 14-15V. Your batteries should even out any voltage jumps, but sometimes the higher frequency stuff isn't dampened by the batteries.
If you see any spikes, pull your alternator fuse to kill the fields for that, and if you don't see any spike you are probably looking at a bad diode in your rectifier or a voltage regulator issue (PCM). Aside from those two... If you see a spike, you may need to track that down slowly after that by slowly checking grounds and circuits until you find the spike.
Edge was okay with me on the deal, and was willing to throw 2 Juice modules at me... But unfortunately they had seen my issue before, but weren't willing to recommend a solution or even suggest what to look for until it was all over and I reached the end of my budget at the time. I still have the CTS sitting new in box, with a burned out Juice module... lol.
ps. I found that not all multimeters are created equal. I borrowed a nice Fluke from a friend and was able to see the spike, but the spike wasn't always evident on any other meters I had or had access too.
