Okay I have a 99 Tahoe with the 5.7 Vortec. Driving it at around 35 mph and it quit. I coasted to the side and tried to refire but nothing. I tried pouring gas into the throttle body and still nothing. I pulled a plug and tested for spark, there is none. Also when I do try to start it the fuel pump does not kick on. So what could cause the power to the fuel pump to quit and the engine not getting and spark? I replaced the Dist. cap and rotor button and have checked all fuses in side panel and panel under hood.