Assuming this van is still carbureted, the fuel filter is located inside the fuel line fitting just as it enters the carburetor. It takes a 5/8" wrench to remove the fuel line and a 1" wrench to remove the fitting from the carburetor. Take note of the positioning of the filter so not to install the new one backwards.
How to replace a fuel filter on a 1984 Chevy S-10
2.8L 2BL 1984 Chevy Celebrity The Fuel Fiter should be located in the coupling between the fuel line and the carburator.
Its either along the frame on fuel injected engines or in the carburetor
on top of the gas tank. u have to drop the tank to get to it
under the vehicle, in front of the driver side rear tire.
In 2004 Chevy started putting the fuel filter inside of the FUEL TANK.
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The fuel filter is inside of the fuel tank. in 2004 chevy moved the filter from the frame rail and put it in the tank.
If your car has the 2.8L V6 the fuel filter is in the fuel inlet of the carburetter. If your car has the 2.5L 4 cylinder engine with fuel injection the fuel filter is probably right next to the fuel tank on the driver's side of the car, at least that is where the later models have their fuel filter.
In 2004 Chevy started putting the fuel filter inside of the fuel tank.