How do you change valve cover gasket on a 99 alero 3400 sfi?

To change the valve cover gasket on a 1999 Alero with a 3400 SFI engine, first ensure the engine is cool and disconnect the battery. Remove any components obstructing access, such as the air intake and ignition coils. Unbolt the valve cover, gently lift it off, clean the surfaces, and replace the old gasket with a new one, ensuring proper alignment. Reassemble by reversing the steps, tightening the bolts to the manufacturer’s specifications, and reconnecting the battery.