On a 2008 Chevy 5.3L engine, the Positive Crankcase Ventilation (PCV) valve is typically located on the valve cover. Specifically, it can be found on the driver's side valve cover, near the rear. The PCV valve is generally secured with a grommet and connected to the intake manifold by a hose. Ensure to check your vehicle's specific service manual for precise details and diagrams.
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