Where is the fuel tank selector valve located on a 1997 f350 diesel?

On a 1997 Ford F-350 diesel, the fuel tank selector valve is typically located on the driver's side frame rail, near the rear of the vehicle. It is positioned between the fuel tanks and the fuel lines that lead to the engine. Accessing it may require lifting the vehicle for better visibility and reach. Always consult the owner's manual or a repair guide for specific details and diagrams.