* Most likely location (for many engine types): The fuel filter is usually located on the frame rail, near the fuel tank, somewhere along the fuel line running from the tank to the engine. It's often a cylindrical canister. This is the *most common* place, but you will need to look carefully along that fuel line.
* Less common location (possible depending on engine and options): In some configurations, there might be an additional filter *inside* the fuel pump assembly located within the fuel tank itself. This is *not* easily accessible and would require tank removal or specialized tools.
To find it: You'll need to consult a repair manual specific to your Suburban's engine (e.g., 5.7L, Vortec 4.3L, etc.). The repair manual will have diagrams showing the exact location. You can often find these manuals online (some are free, some are paid).
Important Note: Before attempting any work on fuel lines, always relieve pressure from the fuel system. This is crucial for safety. Failure to do so could result in injury from spraying fuel. Consult a repair manual for the proper procedure.
