1. Identify your engine: Look for an engine code (like 3.9L, 5.2L, 5.9L) on a sticker under the hood or in your owner's manual.
2. Consult a repair manual: A repair manual specific to your year, make, model, and engine will show you exactly where the fuel filter is located. These manuals are available online (often as PDFs) or at auto parts stores.
3. Look near the fuel tank: While the exact location varies, it's often found somewhere along the fuel line between the fuel tank and the engine. It might be under the vehicle, near the frame rail, or even in the engine compartment, depending on the specific model.
Without knowing your specific engine, I cannot give you a precise location. Trying to find it without the proper information is risky due to the potential for fuel leaks. Using a repair manual is strongly recommended.