I thought I had this one figured out but maybe not.
My '06 LBZ was left unplugged when I went on a recent trip away from AK. This I did on purpose but what I did forget was to disable the auto-start system. The auto-start has a feature that if the block gets to -20F, the truck will start and warm the engine up a bit (~30 of run time). I came back two days ago to a small mound of ice under the exhaust outlet and an indication on the dash of an empty fuel tank (DIC and gauge) plus the truck cranks, no start.
I headed into town, got 5 gals of fuel and re-primed the pump. Problem is, none of my symptoms changed. Do I need to add more than 5 gals?
Does this sound like it could be some other issue?
I'm in BFE AK with no scan tool (ordering a Diablo Predator today) and the "local" GMC dealer is over 100 miles away.
Any suggestions before I call for a tow?

Thanks

it takes a while for the gauge to update... if it ran out of fuel due to the remote start it might take some cranking to get the IP, injectors & lines reprimed.

You said you "reprimed it" i assume you mean back at the filter...

Try cranking for 15-20 sec at a time for a bit to get fuel through rest of the system... give it some time to cool down after a few tries each time.

Not sure if you have done it or not, but make sure all the air is bled out at the fuel filter. Then I would crank it over for a little bit, pump the primer up and repeat this to see if it starts. I am sure you have to bleed the air out of all the lines after the fuel filter. If it is cold enough maybe dump a little 911 in the fuel filter.

GVWR, I ihope all works out for you on this... my questin on this what type of auto start do you have?

Re-priming is a pain! I droped the rubber ring on my fuel filter when changing it and got air in the lines, it took forever to get it started. This is what worked for me- prime the system at the fuel filter (button), push it several times then slowly loosen the bleeder screw. Allow diesel to pour out and then repeat the process. This may take several times to get all of the air out. Each time I bleed the air I tried to start it, then repeated the process. I finally started to get air coming out when I loosened the bleeder screw. Once I was able to get air out a couple of times she started right up.

With a stock CP3 and no lift pump it takes ALLOT of cranking to get fuel from the fuel filter to the injectors.

Just be careful when cranking it over not to do it for too long in one shot or you will burn the starter up (in other words crank on it for 10-15 sec and then stop and let the starter cool off for a couple mins). And if you batteries start to get low hook a charger up to them because dead batteries will kill a starter also.

Here's a tip I learned from a Heavy Truck Mechanic but be carefull open the bleeder, pinch off the vent on the tank, and use your air compressor and pressurize the tank using a rag or something to help seal off the filler. The guy was a mobile truck mechanic fixing trucks on the side of the road in -20 isn't fun so you have to be fast. Good luck

Well another 5 gallons of fuel has the gauge working again. I plugged in the heaters and will try to prime it again this afternoon.
Supposed to be in the low 20s above today. Balmy!

All's well.
I put the additional 5 gals. in this AM and tried the priming over again.
10 minutes later we're back in business.

Thanks for all the help.

Good to hear, good thing you didn't call for a tow.