4086046C91 | Genuine International® Diesel Exhaust Fluid Sensor 15.5/16/23G, QLS 1% SSI Cab Vent 6L V8 - Diesel 2014

6L V8 - Diesel 2014 GMC Savana 3500 Base

Constant need to top off coolant without external leaks

White or black smoke from the exhaust (if fuel is burned for heating)

Part Number: 19435407

4086046C91 | Genuine International® Diesel Exhaust Fluid Sensor 15.5/16/23G, QLS 1% SSI Cab Vent 6L V8 - Diesel 2014Description: A Diesel Exhaust Fluid (DEF) sensor 4086046C91 is a key component in a diesel vehicles emissions control system, specifically within the Selective Catalytic Reduction (SCR) system. The DEF header (also called a DEF tank head or DEF sender assembly) is the unit mounted on or inside the DEF tank. It monitors and manages the Diesel Exhaust Fluid thats injected into the exhaust to reduce harmful nitrogen oxide (NOx) emissions. Part Number: