2008 Chevrolet Trailblazer Oxygen Sensor

First, you should install the new Oil Filter, remove the oil drain pan, and fill the crankcase. Next, you should install the oil level indicator into the oil level indicator tube and check for oil leaks. Finally, you should install the intake manifold sight shield and close the hood.

You should remove the valve rocker arm cover, the valve rocker arms, the valve rocker arm pivot support, and the Pushrods. Next, you should clean and inspect the valve rocker arms and pushrods.

You should be careful not to remove the Radiator Cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if the radiator cap or surge tank cap is removed while the engine and radiator are still hot.