Description:

OEM Part Number:22872118, 904-394, 22902620, 23379348, 84412924.. Diesel Exhaust Fluid Heatercommonly referred to as a "DEF heater", is located in a DEF(diesel exhaust fluid) tank and actually contains a pickup tube for the reducing agent pump module, an electric heating element, a temperature sensor, and an electrode type level sensor. The whole device is called "reducing agent heater and transmitter assembly".. Diesel Exhaust Fluid Reservoir Heater:Replacement for 2012 2013 2014 2015 2016 Replacement for Chevy Silverado 2500 HD /Replacement for Silverado 3500 HD /Replacement for GMC Sierra 2500 HD /Replacement for Sierra 3500 HD 6.6L V8.. Function: When the temperature is below the freezing point, the gearbox heater keeps the temperature of the reducer; A reducing agent is a reducing agent that helps reduce the oxidation of nitrogen oxides (NOx) in the system after diesel exhaust to reduce the amount of nox and release it into the exhaust system, reducing the concentration of nox in the engine's diesel emissions..