What is the first corrective action you should perform if your vehicles engine cranks but does not start for a humvee?

If a Humvee's engine cranks but does not start, the first corrective action should be to check the fuel supply. Ensure there is adequate fuel in the tank and verify that the fuel pump is functioning properly. Additionally, inspect the fuel lines for any blockages or leaks. If the fuel system appears to be in order, then proceed to check the ignition system and electrical connections.