To be certain, you should:
* Consult your owner's manual: This is the best source for the specific location on your exact vehicle.
* Look for a canister-shaped filter: It's usually cylindrical and often has fuel lines connected to it. Look near the fuel tank, following the fuel lines.
* Use a repair manual or online diagrams: A repair manual specific to your year and model Suburban will show a detailed diagram of the fuel system. Online resources like Haynes or Chilton manuals often have these diagrams available.
Caution: Working with fuel lines and filters requires care. Always disconnect the battery's negative terminal before starting any work to prevent sparks. Fuel is flammable, so work in a well-ventilated area. If you're not comfortable working on your vehicle yourself, take it to a qualified mechanic.