2006 Buick Lucerne Owner's Manual - Page 301

4. After the engine cools, open the coolant air bleed valve. There is one bleed valve. It is located on the thermostat housing. 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. Lift the engine cover shield at the front, slide the catch tab out of the engine bracket and remove the cover shield. 3.3. 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. Fill the radiator with the proper DEX-COOL® coolant mixture, up to the base of the filler neck. See Engine Coolant on page 5-23 for more information about the proper coolant mixture. If you see a stream of coolant coming from an air bleed valve, close the valve. Otherwise, close the valve after the radiator is filled. 6. Rinse or wipe any spilled coolant from the engine and the compartment. 7. Replace the 3800 Series II V6 engine cover shield. 7.1. Remove the oil fill tube, with cap attached, from the valve cover. 7.2. Insert the catch tab on the cover shield under the bracket on the engine. 7.3. Place the hole in the cover shield over the hole in the valve cover. Install oil fill tube and cap by twisting clockwise. 5-33