Where is the oxygen sensor on a 1995 Chevrolet C3500?

The exact location of the oxygen sensor(s) on a 1995 Chevrolet C3500 depends on the engine. These trucks came with various gas and diesel engine options. There's also usually more than one oxygen sensor on a vehicle with fuel injection.

To find it, you'll need to:

1. Identify your engine: Look for an engine code (e.g., 454, 7.4L, 6.5L diesel) on a sticker under the hood or in the owner's manual.

2. Consult a repair manual: A repair manual specific to your year, make, model, and *engine* will show you diagrams and the precise location(s) of the oxygen sensor(s). You can find these manuals online (e.g., Haynes, Chilton) or at auto parts stores.

3. Look near the exhaust manifold or catalytic converter: Oxygen sensors are typically located in the exhaust system, either before or after the catalytic converter(s). They are threaded into the exhaust pipe.

Caution: The exhaust system gets extremely hot. Allow the engine to cool completely before attempting to locate or work on the oxygen sensor. Wear appropriate safety gear, including gloves.