Been out of town for the week and weekend. Just had time to work on the truck. Took all the glow plugs out to visually inspect and check by hooking them to the battery. Found the #1 plug fried. Knew there was a problem when I grabbed it to unscrew the nut holding the strap. The plug fell apart in my hands when I got it out. The number 2 plug also had a loose core. It checked ok on the battery test, but I am replacing it also while I have everything out of the way. I put the ohm meter on the wire connecting right and left side and it checked out fine. On my way to the store to pick up two plugs and maybe have this thing running in a couple of hours.
2002 Duramax ext cab 2wd - all stock