Photo 1 of Lym Apex 12671387 Inlet Upstream Nitrogen Oxide Sensor Compatible with Express GMC Savana 2500 3500 4500, Silverado GMC Sierra 2500HD 3500HD, Upstream NOx Sensor Replace 5WK96645H 5WK96631H

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Photo 1 of Lym Apex 12671387 Inlet Upstream Nitrogen Oxide Sensor Compatible with Express GMC Savana 2500 3500 4500, Silverado GMC Sierra 2500HD 3500HD, Upstream NOx Sensor Replace 5WK96645H 5WK96631HPhoto 2 of Lym Apex 12671387 Inlet Upstream Nitrogen Oxide Sensor Compatible with Express GMC Savana 2500 3500 4500, Silverado GMC Sierra 2500HD 3500HD, Upstream NOx Sensor Replace 5WK96645H 5WK96631H