This weekend I was working with a friends truck several hours away from home. He was thinking about lettting me do a tune on it so I read the thing and then we took the thing for a drive. as i had never worked with a 5.3 before i decided to log it before I did anything with it. in the course of logging I plugged my charger in cause the laptop was low and my scan tool promptly crashed. Well ok restarted the scan tool and it worked fine, but then at the stop light the truck dies! It started fine but after then it wouldnt idle. He drove it around and after a while it would idle real slow and eventually it returned to normal. It works fine now but what the flip happened! He was sitting there looking at me like WTF did u do to my truck. I have a good charger so i didnt think that was the problem but im stumped.