HaVE A 96 1500 PICK UP WITH V6 VORTEC, GETTING ONTO FWY TRUCK DIED. NOW IT WILL CRANK OVER, HAVE SPARK AND FUEL TO CARB. WONT START. IF I POUR FUEL INTO CARB IT WILL RUN. ANYIDEAS IAM SITTING ON FWY NOW

If you spray carb cleaner in throttle body,does it start?

Check spark at the spark plug by putting a screw driver up the cover hold it close to an earth and get some one to crank it over ,the spark should jump to earth.

Have you checked fuel pressure with a gauge ? Vortec engines require 65+ psi to run.

You are saying the engine cranks but will not start ? Did you check fuel pressure with a gauge, and is it up the required amount ?
Will it try to start with carb cleaner sprayed into the throttle body ?

Make sure battery has a full charge. If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
If you have tbi fuel injection, fuel pressure is 9--13 psi.
If you have cmfi fuel injection, my info says 55--61 psi.

the probem is probably in the injector assembly whichis under the intake plenum.after removing it you will se the plastic tubes and ijector popit valves unlike actual individual injectors.this whole contraption must be replaced as an assembly.you can get repair manuals from this site or go to you library.it may actually be flooding as these had problems with leaking fuel pressure regulators which i think are also only part of the whole assembly.

it sounds like the crank sensor

bad gas?...can you make it run spraying carb cleaner into intake snorkle?

Check for timing gear problems. They have plastic teeth on the cam shaft gear which will shatter causing it to jump time.

Had the same problem with my '96 Silverado with 350 Vortec. The truck would only crank. It would start if fuel was poured down the throttle body. Could not hear the fuel pump hum. Fuse was good, but could not hear relay click. Relay was good, Did some electrical wiring trouble shooting. Turned out that one of the connectors that clasp onto one of the pins of the fuel pump relay wasn't making a good connection, too loose. I just stuck a peice of wire into the connector and pushed the relay back in. Relay clicked, Truck Started. It's been more than 4 yrs. since I made that McGuyver fix. Still firing.