sounds like an injector to me also not just jumping on the band wagon either. High return on one or more. OR you could get this tool Miller special tools #9011 to block off each injector and rule out wich one or ones it is. when you block off the one thats got high return the truck will start. Only reason you need either is to speed engine rpm to get rail PSI up to fire Injectors!
I'd say injectors, test for return rate.
i have the same problem on my 03 where is the best place to get the cross tube o rings from
Relief valve was swapped, same issue, injectors were next.....wish it was here to play with...off subject...Mudn, can you post again, that chick is smokin!
Jim