OBD2 scanner will not connect to computer?

Take a look up at my last post. I wasn't sure if you were planning on replacing the entire unit or just the module section.

Okay, hopefully your scan tool is able to bleed the ABS unit, I see it had the ABS option on there. Most ABS units need a scan tool these days to bleed the hydraulic control unit and pump. Here's the wiring diagrams for the unit, I would take a look at the fuses that feed the ABS module, just make sure the fuse legs are not brown from being over heated. A couple of them are 40-amp so it's a pretty high current circuit. Also included is the connector and the pinouts in case you need them, clear any codes that might be stored as well. Hopefully everything will be good from here on out.

That's good, but definitely change out the main connector, those female pins in the connector will never make a good connection again. Those 40-amp fuses are the reason it didn't pop a fuse. I think whatever happened in that connector happened pretty fast.
Here are some Recalls and important updates that may not have been done already. These are the ones that have to do with safety, which is why I'm posting them. There's always a list of TSBs a mile long, but you should at least know about these. Pages 1 and 2 go together and also 7 and 8. There are quite a few about that battery cable routing that there were actual repair notices about. Just things to keep in mind. Stay safe.

Which fuse did you remove? I'll look up this code, I'm not too familiar with the newer diesel setups, it's not often I see them, but the glow plug was usually used at cold start up, since a diesel doesn't have a spark plug and relies on very high compression pressures and heat to ignite the air fuel mixture, I would assume that once the engine is hot enough ignition will start in that cylinder. The reason it's a two out of three severity is because of the exhaust system, and the DPF, which is the diesel particulate filter and the oxidation catalytic converter. These can be damaged if raw fuel is entering the exhaust due to cylinder misfires. This is the same on a gasoline engine. A cylinder misfire causes the unburn oxygen and fuel to exit the cylinder and because of the temperatures of the converter this air fuel mixture will cause the converter substrate to melt down into one solid ball and block off the exhaust. Or the substrate breaks apart and ends up everywhere throughout the exhaust, either way it's a catastrophic failure. The only other thing you can do is to unplug the fuel injector to that cylinder, and you'll be running on seven cylinders instead of all eight.
I guess it depends on how long you'll be driving the truck tomorrow. My other concern would be damage to the glow plug driver module. A circuit pulling too much current can fry a driver for that circuit, same as a fuel injector. So those are the risks.

These are high voltage fuel injectors too and require a disconnect tool to unplug the electrical connector, so that does not look like an option.

Oh okay, I think you should be okay then. Was it the ABS fuse you pulled? There are a few of them.

Okay, I don't see any fuses labelled glow plug, I do see fuse 27 and 47 50amp going to the glow plug control module. I'd think that's probably for bank 1 and bank 2. Here are the fuses for the ABS module so you have them. You didn't find any of them blown?

You only have to keep 27 out, that's the bank 1 for the number 1-cylinder glow plug. That's cylinders 1, 3, 5, and 7. So, you're good.

No problem, have a good night.