where is the fuel filter 0n 2013 chevy express 4500 cutaway 6.0l

Hello, Make sure you are hearing the fuel pump run when you turn the key on. If not, you may have a problem with the relay. The fuel filter may be part of the fuel pump, but the best way to find an external pump is to start at the fuel tank and work your way down the main supply line to the fuel rail. If there is not one, you likely have one on the fuel pump.