Where is lifters located in 2003 Chevy Impala?

In a 2003 Chevy Impala, the lifters are located within the engine's cylinder heads. Specifically, they sit on top of the engine’s camshaft and are responsible for transferring the camshaft's motion to the pushrods, which then actuate the engine's valves. Accessing the lifters typically requires removing the valve covers and possibly the intake manifold, depending on the specific repair or inspection needed.