Where is the fuel filter located on a 2004 GMC Sierra truck located?

The fuel filter location on a 2004 GMC Sierra 1500, 2500, and 3500 varies slightly depending on the engine. There isn't a single universal location. It's *usually* found within the fuel lines, not easily accessible as a stand alone canister like in some vehicles. You'll likely need to locate it along the frame rail, somewhere between the fuel tank and the engine.

To find it definitively, you need to:

1. Consult your owner's manual: This is the best resource. It will show a diagram of your specific vehicle's fuel system.

2. Use a repair manual: A Haynes or Chilton manual for your specific year, model, and engine will have detailed diagrams and instructions.

3. Use online resources: Search for "[Your Engine Type] 2004 GMC Sierra fuel filter location" on YouTube or a reputable automotive repair website. Many videos show the location and replacement process. Be sure to verify the year, model and engine match your truck precisely.

Without knowing your specific engine (e.g., 4.3L, 4.8L, 5.3L, 6.0L, etc.), providing an exact location is impossible. The engine type is crucial for pinpointing the fuel filter.