How do you adjustment the idle on 1992 GMC sierra 5.7l?

To adjust the idle on a 1992 GMC Sierra with a 5.7L engine, locate the idle adjustment screw on the throttle body. Start the engine and let it warm up to normal operating temperature. Use a screwdriver to turn the idle adjustment screw clockwise to increase the idle speed or counterclockwise to decrease it, aiming for the manufacturer's specified RPM. Always ensure the vehicle is in park or neutral and that all accessories are off during this adjustment.