Seller notes

Product Description 12589867Knock Sensors for Chevy Silverado Cadillac Express GMC ACDelco 213-3521 This Item will Ship from USA Warehouses.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.Description:△ Prime & High Quality△ 100% Factory Tested△ We recommend you find the Professional Installation. (Installation instruction is not included.) Specification:Built to strict quality ...

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