Need some help. 2003 Duramax 2500hd LB7/ Allison4 weeks ago came everything running fine. Next morning it cranks but will not start. Fast forward. Checked all circuits has no codes, communicates with all modules. VTD works proper. Injectors not getting power from FICM. Engine runs via manually injecting fuel. All power and grounds going to all modules good. Communicates good.