Where is the O2 sensor located on a 1998 Chevy s10?

On a 1998 Chevy S10, the oxygen (O2) sensor is typically located in the exhaust system. There are usually two sensors: one is positioned in the exhaust manifold or just downstream of it (upstream O2 sensor), while the other is located further down the exhaust pipe, before the catalytic converter (downstream O2 sensor). To access them, you may need to raise the vehicle and safely support it, as they are mounted on the exhaust components.