97 chevy 1/2 ton 5.7 vortec truck won't start

have you changed the fuel filter and emptied the gas tank and put fresh gas in? Stale gas will not start as well as fresh gas and there could be water from condensation in the tank.

If the pick-up filter is located at the front of the tank and the tank is almost empty the pump would starve for fuel.
murf427

Tap on the bottom center of the fuel tank while someone cranks the vehicle. If it starts you probably have a failed fuel pump assembly.

ok first did you push brake to move shifter?

firing order for 5.7 v8 is 1-8-4-3-6-5-7-2 mostly all of the chevy v8s are the same firing order. the rotor button in distributer turns clockwise, the cylinder numbers are 1-3-5-7 on drivers side, 2-4-6-8 is on passengers side. To get started get your distrutor cap[new one] look on the top you will see a #1that's where you begin you must know if if rotates clockwise or counter clockwise start in that direction then follow the firing order and cylinder line up. good-day!! if cap is not marked, just pull out #1 plug, put a straw or similar in plug hole on top of piston. turn engine over by crank in front of vehicle with a wrench, when the piston comes to the very top just before it starts going down. this is tdc. and rotor button should be pointing to #1 wire on dist, cap. follow from there. good-day !!

Check the big plug behind the dash - they can come loose

The # 5 cylinder is miss firing. not getting fuel. Could the injector just be stopped or the crankshaft sensor in gone.

when you cut the key on do you hear pump run for a few seconds? if not then it is probably pump. try beating on tank with your hand while someone spins over. sometimes this will shake the pump and it will kick in. if this is case then you will still need pump because it WILL happen again. let me know

no it comes on when you turn the ignition.

your fuel pressure regulator could be bad also check fuel pressure with a guage it should be about 55 to 65 pounds