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The GM 12639277 Water In Filter Sensor is a genuine OEM replacement Water In Filter (WIF) Sensor. The WIF sensor threads into the bottom of your OEM fuel filter. These water in fuel sensors are considered a wear item due to time and repeated filter fuel changes. Over time, these sensors can crack, break, strip or become damaged allowing air leaks which will cause hard starts and poor performance. To prevent damage to the water in fuel sensor during routine maintenance, we firmly recommend the use of a WIF Wrench.
This WIF is a pure AC Delco GM Original Equipment Water in Fuel Sensor which is responsible for letting the Engine Control Unit and dashboard lamp indicator know when water detection has occurred in the vehicle's fuel supply. AC Delco GM OE Water in Fuel Sensors are a GM-recommended replacement for your vehicles original components. These original equipment sensors are manufactured to fit your specific GM vehicle and will provide the same performance, durability, and service life as your original factory equipment.
The 12639277 is a GM replacement part that is guaranteed to meet all of the manufacturer's specifications and carry the same warranty as with GM vehicles.
