Ed, this should help out.
http://www.thetruckstop.us/forum/showthread.php?20526-Think-I-ve-got-a-bad-vane-pos-sensor&highlight=Vane
http://www.thetruckstop.us/forum/showthread.php?18290-LBZ-Turbo-Vane-Position-Sensor-Replacement
They are a good tool no denying that. This is the one I use Foamaster Foam Wash Gun. You do not need nearly the amount of soap he goes through. Marketing reasons I'm sure.
My only suggestion is once you are done getting the paint back to where you want it DO NOT use his methods to maintain it.
That guy in the video is a clown. I would not let him wash my exhaust tip. I think the only thing I see that is right is he is using a microfiber mitt and water.
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I wonder if the lower ball joints can be done in the truck. NAPA sells complete lower control arms but you will still have to deal with the torsion bars.
Take the batteries to be tested. This is better than just throwing money at it. You might just get your answer after testing. Start with the easy things James.
Assuming you have cleared the codes first I would confirm two things. First confirm with a meter the ones you replaced were bad. Second confirm you changed the correct glow plugs.
Pass - Driver
Firewall
7 --- 8
5 --- 6
3 --- 4
1 --- 2
Radiator