To pinpoint the exact location, you'll need to:
1. Consult your owner's manual: This is the most reliable source. It will have a diagram showing the location and potentially even removal instructions.
2. Check a repair manual specific to your Suburban's year and engine: A Haynes or Chilton manual will give detailed diagrams and instructions.
3. Use an online parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to select your year, make, and model, then view a parts diagram. Search for "fuel filter" within the diagram.
Without knowing your engine size (e.g., 5.7L, 4.3L), it's impossible to give a precise location. However, the general area is under the vehicle, near the fuel tank, and often requires some maneuvering to reach. Be prepared to get dirty and possibly need tools (like wrenches or fuel line disconnect tools) to access it.