What is the fuel pressure specs on a 2002 Chevy 1500 with a 4.3l engine.

You need to test the fuel pressure that the fuel rail in the engine. Test it with just the key on, and then test it with engine running. If it is within specs you need an auto electrician with a pro grade scan tool computer to read the live data as the event happens.

Fuel Pump Pressure Specs? - Grand Prix - 2CarPros

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Oct 5, 2010 - Check fuel pressure with a mechanical gauge, should be above 40psi, and when you "blip" the throttle it should go up 5psi or so. Some pumps are ...

2005 Chevy Trailblazer service manual said the same 345-395 kPa (50-57 psi)

Base fuel pressure at idle for a MPFI engine is around 40-45 psi. It if were a vortec engine like the 4.3 V6 the pressure would be around 70psi.

Just because it pumps gas doesn't mean it is at the exact pressure it should be? Most fuel pumps have a psi of 40 to 45 psi, your fuel pump could be pumping at 25 psi or less which is not enough to start your car even though you can see some fuel pumping out. A simple tool to check fuel pressure can be bought at any auto parts store, check the specs on the fuel pump for your 02 Chevy first to see at what pressure it works, then use the fuel pressure gauge to check it. Anything less than what the specs on your fuel pump are suppose to be and you have a bad fuel pump?

Let's say your fuel pump works at 43psi, you hook up the fuel pressure gauge and you find that it reads 25 to 30 psi, that means it's not enough fuel pressure to start your engine.

Not enough fuel pressure if this truck is fuel injected.In 1999 chevy fuel systems need at least 52 psi to open the popet valve inside the injector to allow fuel thru.Fuel pressure specs are 60-66 psi with on and engine off.

Can you post the fuel pressure spec for us? You have the spider fuel system? When you use a gage and check proper fuel pressure, with the key off will the pressure hold for a bit? If it drops like a rock, you have a fuel pressure leak.
Smell of the crankcase oil dipstick, does it smell like gas? If so, either you don't change your oil and filter very often or you have a fuel leak getting into your crankcase. If the problem is the latter, you fix the problem then change oil and filter as many times as necessary to get rid of the gas.
Check the fuel pressure regulator and vac line.

The code indicates that you have a rich mixture on bank 1 and on bank 2. This is usually indicating the O2 sensor but it is not 100% It could be the fuel pressure regulator allowing too much fuel or it could be coolant sesor saying the engine is cold therefore requiring more fuel.Without having the vehicle hands on it is hard to tell but I hope I gave you a starting point.

http://www.automotive.com/2002/101/chevrolet/suburban/1500-utility/37/specifications/index.html

The fuel pump specs are 14 psi. and 20 gallons an hour.

I would verify fuel pressure is in spec.On the back of the motor on the drivers side you will find a shrader valve(kinda like a valve stem on a tire)Its just alittle larger.You can buy a fuel pressure gauge at your local parts house and they can give you the spec as well.If its not in spec the pump is in the gas tank.