Here we enlist some simple steps on replacing the 5.3 lifters without removing heads. 01. Firstly, you need to check the engine to detect the ducts, sensor, and pipes position.  02. Now, unplug and remove all the electrical wires, sensors and tubing. 03. Then, remove the upper manifold to reach the lower manifold. You may need too much time to disconnect the sensor and the cable. Be careful in removing retaining clips and brackets.  04. Up next, you need to remove your vehicle’s nuts and bolts. Then, pull up the upper manifold. Take a rubber mallet to lose if you find the upper manifold is stuck. Also, be careful while removing your car’s oil lifter set. 05. Now, take a new filter, place it in the right place, and then tighten it using a wrench. Don’t forget to use the necessary lubricant to fill the filters. Then reconnect all the previous sensors and cables. 06. Finally, recheck every connection and then start the engine and see whether it works properly.