Where on the engine would you find smog pump 2001 s10 truck?

On a 2001 S10 truck, the smog pump (also called an Air Injection Pump or AIR pump) is typically located on the passenger side of the engine, near the front. It's often bolted to the engine block or a nearby bracket and will have a hose running to the exhaust manifold(s) and another to the intake manifold or throttle body. It might be somewhat hidden, so you may need to look carefully.