How do you change PCV valve on 1991 chev s10 4c?

To change the PCV valve on a 1991 Chevy S10 with a 4-cylinder engine, first, locate the valve, which is typically found on the valve cover or the intake manifold. Disconnect the hose attached to the PCV valve and twist the valve to remove it from its socket. Install the new PCV valve by pushing it into place and reconnecting the hose. Finally, ensure everything is secured and check for any leaks before starting the engine.