* Oxygen Sensor(s): The 94 Transport likely has multiple oxygen sensors. One will be located in the exhaust manifold or close to it, downstream of the catalytic converter. Another (possibly two, depending on the emissions system) will be located before the catalytic converter. These are usually threaded into the exhaust system. You'll need to consult a repair manual or a diagram specific to your engine to pinpoint their exact placement. They're typically wire-connected.
* Fuel Filter: On a 1994 Pontiac Transport, the fuel filter is usually located within the fuel lines, *not* easily visible under the hood. It's often near the fuel pump, typically along the frame rail, close to the fuel tank. Accessing it usually requires working underneath the vehicle. You'll need to consult a repair manual for the precise location as it can be hidden from plain sight. The fuel lines will be connected to it.
Important Note: Before attempting any work on your vehicle's fuel system or exhaust, always disconnect the negative battery terminal to prevent accidental sparks. Fuel is flammable, and exhaust systems are hot. A repair manual specific to your 1994 Pontiac Transport (with your engine size) is highly recommended for accurate location and safe procedures. You can often find these online or at auto parts stores.
