2004 Buick Regal Owner's Manual - Page 245

3.1. Clean the area around the engine oil fill tube and cap before removing. Twist the oil fill tube, with cap attached, counterclockwise and remove it. 3.2. If the vehicle has a supercharged engine, remove the nut in the center of the cover shield. 3.3. Lift the engine cover shield at the front, slide the catch tab out of the engine bracket and remove the cover shield. 3.4. Put the oil fill tube, with cap attached, in the valve cover oil fill hole until you are ready to replace the cover shield. 5-37