I own a 2003 4x4. Two weeks ago I changed out the battery (went bad). I drove it for 5 days, no problems. Then sunday morning the truck was completely dead, I charged it for 12 hrs and was unable to start even after trying to jump start it. I changed out the battery then had the alternator tested, still good but went down quite a bit once a load was put on. I changed out the alternator anyway....ran well for 4 days and now the truck is completely dead again. Has been charging for 8 hrs but still won't start even when jumping from another battery. It won't even turn over.....any ideas?