Where is the knock sensor located? on 2007 Chevrolet Silverado 1500

fuel mileage is worse and valves are taping

Asked by for the 2007 Chevrolet Silverado 1500
2 answers
Top of the engine under the plenum to the back side of the valley.
Is there a knock sensor related trouble code in the ECM? There are many things could cause this. You could just waste your money on unnecessary parts without a diagnostic.