* Primary Fuel Filter: This is located on the frame rail, near the fuel tank, usually towards the driver's side. It's a larger filter.
* Secondary Fuel Filter (Water Separator): This is also on the frame rail, but typically closer to the engine than the primary filter, and often closer to the passenger side. This filter is designed to separate water from the fuel.
Because their exact placement can vary slightly depending on specific options and modifications, it's best to consult a repair manual specific to your 1995 F-250 Powerstroke or use a repair database like Mitchell 1 or AllDataDIY (subscription required) to get a diagram. Visually inspecting the fuel lines running from the tank to the engine will usually help locate them. They're usually cylindrical and have fuel lines connected.
