I have the civvy version of the cucv - '82 k10 with 6.2 diesel + manual tranny. The electrical system on that truck is its Achilles heel. In the 20 years I've owned that truck, this is the only area where I've had problems - glow plug controllers, glow plugs, starters. I've been through 4 starters and only a few weeks ago figured out why. The primary cables and the crap modular conectors used for the civvy batteries are severely undersized and can't get the necessary amps to the starter so it and the solenoid eventually burn up. I got mad and rewired with 2/0 welding cable and military battery terminals - wow does it ever crank now! The 24v starter system on the cucv will surely avoid that serious design defect.
I see lots of posts about the glow plug controller on the cucv and I conclude it is similar to the crap used on the civvy version. Chevy really blew it and designed in 6 volt glow plugs on the 12v truck! They cycle the plugs on and off every few seconds to keep them from frying. If they are on for more than 20 seconds continuously, they fry. That is what the chevy factory manual fo the 6.2 diesel says and I can tell you it is true. Replacements are about $40 each (8 needed = $320). I disconnected the whole mess and just give big stinky a little shot of Mr. Ether right into the air cleaner intake on my first start of the day after th truck has sat all night. It spins about 2 revolutions and fires right up every time. No need to do that any time the rest of the day, no matter how long it has been parked after being started that same day. Do not use ether if the glow plugs are connected because you'll blow the engine up, but one connector on the glow plug relay is all you have to pull off to disable th glow plugs. I highly recommend doing that first and using the ether at GL because that will save your battery (glow plugs pull 125 amps), guarantee a quick start, and will start the motor even if the fuel system lost prime from sitting for a long time (another chevy 6.2 'feature').
Have fun, they can be temperamental, but through Cali brushfires, Colorado blizzards and Arizona record heat, big stinky has always come through!