I hate to re-invent the wheel especially when people like you have already answered this question. That being said, I have searched what I feel is 9 ways from Sunday to find a good upfront guide, on here, google and the other forums but have yet to find something inclusive on how to change your Glow Plugs.
I was having issues starting, I first thought it was my fuel bowl heater that is unplugged because it toast the 30amp fuse when plugged in. After researching this I found that it has no effect on starting and is simply a tool to prevent fuel gelling. From here I started looking at the glow plug system.
Thanks to NCHornet and his guide Troubleshooting GPR & GP's
I have narrowed it down to my glow plugs. GPR cycled on for the 2 minutes with 11.5v, pulled valve cover plugs and had 3 toasted on passenger side, 1 on driver. I plan on replacing this with either the Bosch or Motorcraft plugs, both cost the same (actually Bosch are a little cheaper with my military discount).
Now after figuring out how to pull the plugs on the valve cover and how tight it is, I am looking for some help to pull the covers. I have tid bits of info I found here and there like, use a turkey baster to remove the oil from the top of the plug before you back it out so you don't hydro lock the cylinder etc. Does anyone have a good step by step guide to remove the valve covers and change out the glow plugs, pictures would be even better, like what to remove, how to do it etc.? I have heard horror stories about them being stuck in the block and having to remove the heads if you break them on removal. I am poor and cannot afford this, if that's the case I would rather just bring it to the dealer and have them change the plugs. I need to change these so I can sell the truck, I can not knowingly sell something that is not right, I just can't do it (unlike the previous owner..)
Thanks for all your help, once again... (All the info I found and the few posts I made on things like fuel bowl heater, tie rod ends, oil drip, horn etc... You guys are great and very helpful).
Edit: Oops, I forgot the truck. It is a late 99. Thanks again