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On a 2004 Chevy Avalanche, the PCV (Positive Crankcase Ventilation) valve is typically located on the valve cover. You can find it on the driver's side, near the back of the engine, connected to a rubber hose. To access it, you may need to remove any covers or components obstructing your view. Always refer to the vehicle's service manual for specific details and guidance.

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4mo ago

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