Photo 1 of Cardoctor 12676706 Downstream Nitrogen Oxide Sensor Nox Sensor 12673517 12680469 Fits Chevrolet Silverado GMC Sierra 2500 3500 2017-2018 (12676706 Downstream, Nox Sensor)

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Photo 1 of Cardoctor 12676706 Downstream Nitrogen Oxide Sensor Nox Sensor 12673517 12680469 Fits Chevrolet Silverado GMC Sierra 2500 3500 2017-2018 (12676706 Downstream, Nox Sensor)