GM Nitrogen Oxide (NOx) Sensor Position 2 6.6L Duramax | 2011 - 2014

ACDelco GM Original Equipment NOx (Nitrogen Oxide) Sensors are exhaust gas sensors that detect the nitrogen oxide content of exhaust from diesel engines, and are GM-recommended replacements for your vehicle's original components. The information from these sensors is used by the engine control module (ECM) to adjust various parameters to help reduce harmful emissions.
This is the NOx sensor for position 2 which is located in the exhaust particulate filter that connects to the tail pipe.