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One fuel filter is in the fuel pump of the Express Chevy 3500, which is used to push fuel or gasoline through the fuel line. The fuel pump is inside the gas tank. This fuel filter is a mesh or screen that prevents large foreign particles for entering the fuel pump. Access to the fuel filter is obtained by removing the fuel tank and then the fuel pump from the fuel tank.
Second Fuel Filter Location
The second fuel filter is within the fuel line itself. After the fuel pumps extracts fuel from the gasoline tank and into the fuel line, fuel flows through the line and through another filter on the driver's side of the Express Chevy 3500 under the front wheel suspension. This fuel filter cleans the small particles that escaped from the fuel tank.
Fuel Filter Types
The year of your Chevy Express 3500 determines what type of fuel filter is installed on the van. The fuel tank filter is always mesh or screen, but the fuel line filter can be of three different types. Two types are snap-on filters, while one type has clip-on ends.
I don't know liter size of engine? The relay has two sides, the load side and the control side. The load side, looks like open switch, left side. Terminal 87 is hot all the time. The right side of relay is control side, needs voltage and ground. On the control side, dark green wire with white tracer is voltage, comes from pcm. The black wire is chassis ground.
Are you missing anything else? Engine cranking, you have spark at the plugs where applicable, and fuel injector pulse? With engine cranking, if your missing everything, I'd have to check rpm signal.
There is not really a fuel pressure sensor. There is a fuel pressure regulator. The fuel pump pumps up pressure and the pressure regulator allows the fuel to return to the fuel tank if the pressure reaches 37psi in the 4.6 liter. It is located on the intake manifold. It is round about 3 inches in diameter, and has a fuel line on both sides of it.
replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump
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