Why wont my truck start?

Pull the fuel line out of the throttle body, hold a bottle under it, and turn the ignition to turn the fuel pump on. If feul comes out, the injectors might need to be cleaned at a specialist. If it doesnt, then the fuel line is blocked or crimped somewhere.

EDIT

To the people that said its the pump, THE GUY SAID HE PUT IN A NEW FUEL PUMP!

Do the test that i've mentioned to see if fuel is coming to the tb 1st.

Is there any way the fuel supply and return lines could have been reversed at the connection on the fuel pump.

Or maybe the fuel pressure regulator is routing too much fuel back to the gas tank and not enough is going to the motor.

One other thing to check is whether the injectors are getting the signal to open. You can buy an injector test light to see if they are getting power.

Ok . Throttle body = TBPSensor 1dirt in it 2 no signal

Fuel injectors Same as above

I have even seen it be caused by a bad gas cap. My father had a 94 Bonneville pulled up for gas , got some , left the station but stopped at a mart and it wouldn't start again check engine light was on wouldn't fire or anything , until he checked the gas cap , it wasn't tightened right. Started right up. You might need a new gas cap.Good Luck.

u should hear ur fuel pump cycle,yes?u really need 2 hook up a fuel pressure guage.vortecs are stubborn starta under 60 psi..shitty napa pump or gm pump.......if u can not hear fuel pmp cycle when u first cycle key.....the four wire plug in @ the pump..unplug,test wiring from truck w simple test light....connect 2 known good grnd,get someone 2 turn key on and strike starter when probing wire,should find one that will light 4 2 or 3 seconds...it may b purple....if u find ur pos hit u still need 2 find ground....hook up test light 2 known power,poss batt cbl...key on one of the other three should be black n light test light....u got this,u got junk pump...dont throw an o2 sensor at it....yer mamma wears combat boots...it does say vortec under ur hood right,1996?if it were injector it would just run poorly....do this test if u dont hear pump!and a wifebeater tank top.

Well I think the reason your truck won't start is one of two reasons ...

1, God doesn't like you

2. The ghost in your house has now become the ghost in your truck

<3 don't forget you can borrow my station wagon ;)

lemme know if you need me to bring it to you.

I'd check for fuel pressure with a gauge, start there.

A warm battery cable to starter shows severe resistance or a foul cable. you may desire to interchange it. and you may desire to get rid of the starter. And in doing which you may desire to verify the starter and consistent with threat when you consider that age of auto in basic terms replace it as properly.

it sounds to me like you have bad fuel injectors. if they are functioning proper, then your timing or cams may be a little off. that is really a predicament you have on your hands. oops, shoulda gotten a ford!

somthing still unpluged recheck firing order check crimps in fuel line