Update:
Not only was it a bad battery, but also a bad alternator.
Truck did the same thing coming home from work on Thursday night. Stereo went dead, and the turn signals froze. So when I arrived home, I removed the pos. battery clamp and she automatically died.
Removed the alternator yesterday and brought it down to Autozone to have it tested, failed three times, new alternator!
The alt. # Autozone has for this year and engine is wrong. The electrical connection is much larger. My alt. had a smaller "T" shaped connection.
http://www.autozone.com/autozo...mport
Also replaced all the battery cables with new 2 ga. cables. The positive cable ended up being 32" long,(25" was just a little too short, and 32" is just a little long) but I'd rather have it a little long than short. The negative cable is 25". I also noticed the stock body ground was missing too! Someone at some point had cut the posts off both the battery connection and taped the engine connection and tucked the wires. So when you look in, it looks like they are connected. I removed the tape and reattached the engine connection, so at least that was grounded. It's amazing how much brighter lighting is when there is a good ground connection!
So far she is running like a top!