Photo 1 of DrCax 12671387 NOx Nitrogen Oxide Sensor Upstream Inlet Compatible with Chevrolet Express Silverado GMC Savana Sierra 2500 3500 4500 Replace 5WK9 6631H 12642310 12669594

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Photo 1 of DrCax 12671387 NOx Nitrogen Oxide Sensor Upstream Inlet Compatible with Chevrolet Express Silverado GMC Savana Sierra 2500 3500 4500 Replace 5WK9 6631H 12642310 12669594Photo 2 of DrCax 12671387 NOx Nitrogen Oxide Sensor Upstream Inlet Compatible with Chevrolet Express Silverado GMC Savana Sierra 2500 3500 4500 Replace 5WK9 6631H 12642310 12669594Photo 3 of DrCax 12671387 NOx Nitrogen Oxide Sensor Upstream Inlet Compatible with Chevrolet Express Silverado GMC Savana Sierra 2500 3500 4500 Replace 5WK9 6631H 12642310 12669594