Driver side rear between firewall and engine block. It is bolted in with one of the engine and trans bolt. You will have to remove the wiper motor to get to it.
under the passenger side floor next to body rail
Right above the oil filter , in the engine block.
the fuel filter is located on driverside rear in front of the rear wheel.
The fuel filter for a 1986 Chevy G20 should be mounted on the frame under the van. The filter is an inline type and should be easy to change.
On the fuel line going to the carburetor.
Passenger side , behind front wheel well. Make sure that you remove the fuel pump fuse and run the car till the motor stops so that you remove the fuel pressue when you go to change the filter
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1 is located in the rightside frame rail near the rt. front wheel. the other is in the fuel tank.
the fuel filter is located on the drivers side close to the fire wall, its white an looks like a little canster with to lines on it.
That would be the oil sending unit.
The 1986 Chevrolet C10 pickup truck fuel filter is located inside of the fuel tank. The fuel tank will need to be removed in order to change the fuel filter.