* In the fuel tank: This was a common placement in the late 80s. If this is the case, you won't see an external filter. The filter is integrated within the fuel pump assembly inside the tank. Replacing it requires dropping the fuel tank.
* On the frame rail: Less common, but possible. It would be a cylindrical canister somewhere along the frame rail, near the fuel tank. Look for fuel lines running along the frame; the filter is likely nearby.
To find it definitively:
1. Consult your owner's manual: This is the best source of information for your specific vehicle.
2. Check online repair manuals: Sites like Chilton or Haynes offer repair manuals specific to your year and engine. They will have diagrams showing the fuel system.
3. Look under the vehicle: Carefully inspect the area around the fuel tank and along the frame rails for a cylindrical canister with fuel lines connected.
Important Safety Note: Be extremely careful when working near fuel lines. Fuel is flammable and fumes are explosive. Disconnect the battery negative terminal before starting any fuel system work and ensure good ventilation. If you're unsure about any aspect of this task, consult a qualified mechanic.
