The fuel filter is located in the fuel inlet on the front right side of the carb.
You will need a 1" open end wrench to hold the 1" side steady and a 5/8" flare nut open end wrench to remove the fuel line then use the 1" to undo the filter retaining housing to service the filter.
Use caution here as the steel fuel line is tough to manipulate for clearance with out bending it and can be a real bear to line back up "if you do bend it" and get the threads to start so you can re connect it...
Don't cross thread the filter retainer housing into the carb as the carb is made of soft metal or pot metal and is easily damaged and could cost you a new carb...
Good Luck
Where is fuel filter
Answer to: Where to find the fuel filter for a 1994 GMC Vandura 2500? Try looking on the under carriage just below the driver's door. There you should find a 3" cannister on the fuel line.
Its in the carb ,where the gas line connects.
fuel filter has to be changed every 8000 miles or sooner if it plugsup sooner
If it's a gas engine, there's an inline fuel filter which runs alongside the frame rail. If it's the 6.5 Detroit Diesel, it's a spin on fuel filter.
e-bay
Yes
I would start with replacing the fuel filter if you haven't already done so. Then check the fuel pump.
4.1 liter V6
There is not one.
under dash, far left
driver side underhood