Hey Scotty, I have a 1999 GMC Sonoma 4 Cylinder that I have replaced the fuel pump, ignition coil, spark plug wires, and spark plugs and it still will not start. It will crank/turn over but it will not start up. I can hear the fuel pump cut on and the starter is turning the engine over, but it just will not start up. What problem could this possibly be? Thanks!