Answers: probably the pcm...or a possible wiring harness problem. any way your not getting pulse current to the injectors.
Fuel pressure, fuel pump, fuel filter, vapor lock, clogged injectors, bad fuel pick up, computer, relay, sounds resembling diesel? Gelled fuel? Block heater. Not enough info to know. This sounds approaching you have a 4.3 GM Vortex or a 8 cyl. vortex. If so, its probably your fuel injectors. VERY common on the vortex engines. What benign of truck??
heres some tests to see if your gettin fuel unplug the wires from the spark plugs.crank it over a few times take a spark plug smell it and if it smells approaching gas your gettin fuel to the cylinders. make sure you have the correct air/fuel mixture , spark timed contained by, check the fuel pump, etc. "Injector Flew Out?" Injectors are Bolted Down in Place and Sealed, it Takes a Puller to get them out! If one Flew Out (Strange) First you hold a Problem with the Head! Possible some of the Small Lines from the Fuel Rail to the Injectors are Clogged. Sounds like within are other problems also but to go into More Detail I'll need Car Type & Year? Engine & Mileage?
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