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Store CategoriesStore CategoriesOther Product Description 2x For ACDelco 213-3521 Knock Sensors for Chevy Silverado Express GMC 12589867 Please check if the Part Number, Fitment Details and Listed Pictures above same as yours before purchasing. Contact us freely, if you have any question or problem. Specification: Built to strict quality control standards Engine Knock Sensor Dual Connectors & Grommets Direct replacement 100% factory tested Interchange Part Number： 213-3521 / NA, 12589867, 1045...

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