I screwed up. 07 classic Duramax won't start

[deltadude]

I know better but did it anyway. I started my truck and moved it and then shut it off. It only ran for about 30 seconds. Now, the next day, it won't start. Cranks just fine but will not catch. I'm assuming I lost the prime. I looked in the manual but don't see anything other than being told not to use starting fluid. It says if it doesn't start, it needs to be serviced. Any hints out there? I've had boats with diesel engines and have had to loosen injector lines to bleed them but they were much simpler engines.