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Just wire it to the front battery- it is 12V.

Have you measured the voltage on a glow plug when the key is first turned?

I am not sure what you are saying. This engine develops vacuum with a vacuum pump. There isn't any real vacuum in a diesels intake manifold like in a gasoline engine.

Interesting info, but there seems to be other sources that say that each plug should be 13-14 amps for AC-60G. This source says that each bank should be drawing 50-55 amps, or 100-110 total. GM Diesel Hummer Glow Plug Operation, Testing & Troubleshooting

The resistor block will drop the voltage to about 12V only if everything else is working correctly and it is a 24V system. For it to work properly all of the connections have to be good, all of the glow plugs good, relays good, battery connections good, ground connections good.... If you are...

As long as it is greater than 600 or 650 amps you are fine. A 1000 amp battery is a great choice.

Also check the ground wires coming from the front battery, make sure all of the connections are tight, at the body and the wire that goes to the engine block.

You need load test the batteries, take them to AZ and they will test for free, easier and cheaper than immediately changing the starter. Sometimes a bad cell in a battery can make it look good until it is under load. Clicking relays are usually a sign of low voltage. Could be a bad connection...

Does not sound "right" to me. Does the sound change if you shift into neutral while at speed? Or turn the steering wheel left or right?

? You do not need the alternators hooked up to start the vehicle. But of course no one would leave it like this for any length of time. It sounds like a wiring problem or a bad rebuild to me.

The orientation does matter, in this case you want to put the end with the stripe towards purple and white wire. If you get it wrong it will burn up.

Good like finding a CUCVII at this point, they don't show up on GL very much.

You should probably ask them to define your problem a little better. Did they say that you needed a new steering box?

Have you checked that there is actually vacuum being produced?

Well, 195 sounds like the temperature is right where it should be if it has a 195 degree thermostat. If you are not getting any heat and the engine is hot I would verify that the heater hoses going to the cab are both hot, then I would check that hot/cold damper is actually moving like it...

Here it is: http://www.steelsoldiers.com/cucv/37979-few-pics-my-m1009-camo-netting.html

There was a picture on here not long ago where the tools were all mounted on the front bush guard. I am sure that it was custom, but it looked really nice.

If you have a visible fuel leak, especially around the fuel filter you need to take care of that first. Then if you still have a problem I would look at the glow plug system next. On a cold engine, when you first turn the key on, check the voltage at one of the glow plugs. You should see about 12V.

To charge the batteries you do not have to disconnect them. Just put the charger across the battery as you would any car, except that you have two of them. Also I have added a fuel filter that looks just like the one pictured above except that it has the longer "60" filter on it and a fuel...

Don't get ahead of yourself and replace everything just yet. You should still do the tests, there is still the possibility that it is just the glow plug relay. I had an intermittent one on mine that was hard to find- sometimes it had 12V going to the plug and it always made the audible click...