To find it, you need to:
1. Identify your engine: Check your vehicle's documentation or the engine bay for an engine code (e.g., 5.7L TBI, 7.4L TBI). This will help narrow down the possibilities.
2. Consult a repair manual: A repair manual specific to your year and engine will show you diagrams with the exact location of the O2 sensor(s). This is the most reliable method. You can often find these online (e.g., Haynes, Chilton) or at auto parts stores.
3. Look near the exhaust manifold (upstream): The upstream O2 sensor(s) are typically located in the exhaust manifold or very close to it, on the exhaust pipe before the catalytic converter. They're usually threaded into the exhaust system.
4. Check after the catalytic converter (downstream): Downstream O2 sensors are less critical than upstream ones and are located further down the exhaust system, after the catalytic converter.
Without knowing your specific engine, I cannot give you a precise location. Using a repair manual is highly recommended to avoid damaging other components.
