No spark, no fuel is likely the result of the triggering used by Gm vehicles. The ignition module is responsible for both. If the fuel pressure is present, it is likely a module related issue, but troubleshooting remotely is difficult. The trigger signal tells the computer when to trigger the injectors, with a ground signal, it is also responsible for ignition until the engine starts. Once the engine starts, this signal is used by the computer to advise of triggering and rpm signals. Ray