Fuel Filter:
* The fuel filter on a 1994 Suburban 1500 is typically located near the fuel tank, on the frame rail. It's often in a somewhat protected location, sometimes requiring you to get underneath the vehicle to access it. It's usually a cylindrical canister with fuel lines connected to it. Look near the rear axle, toward the driver's side (left side) of the vehicle.
PCV Valve:
* The PCV valve is located on the valve cover of the engine. The valve cover sits on top of the engine block. It's a small, usually black, plastic or metal valve. It's relatively easy to access once the hood is open. Look for a hose that runs from the valve cover to the intake manifold—the PCV valve will be near the end of this hose on the valve cover.
Important Notes:
* Consult a repair manual: For the most accurate location specific to your Suburban's engine (5.7L or 7.4L), consult a repair manual for your specific year and engine. A Haynes or Chilton manual will provide detailed diagrams and instructions.
* Safety First: When working with fuel lines or the fuel filter, always take appropriate safety precautions. Disconnect the battery's negative terminal before starting any fuel system work to prevent accidental sparks.
* Visual Inspection: Once you're under the vehicle or have the hood up, take a good look around the areas described above. You'll likely spot them quickly with a little searching.
It's always recommended to consult a repair manual for precise locations and procedures before attempting any maintenance or repair work.
