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
Top of the engine under the plenum to the back side of the valley.
1 more answer
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.