HomeAir and Fuel Delivery > SensorsStandard Ignition FWSS101 Water in Fuel (WiF) Sensor
Part #: FWSS101

Standard Ignition FWSS101 Water in Fuel (WiF) Sensor

⚙️ 52 vehicles fit this part
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🚗Fitment: Chevrolet and GMC, Silverado 2500 HD, Silverado 3500 HD, Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD Classic, Silverado 3500 Classic, Sierra 2500 HD Classic, Sierra 3500 Classic, Express 2500, Express 3500, Silverado 3500, Savana 2500, Savana 3500, and Sierra 3500
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Overview of Standard Ignition FWSS101 Water In Fuel Sensor

The Standard Ignition FWSS101 Water In Fuel (WiF) Sensor is designed for diesel-powered Chevrolet and GMC trucks and vans. This sensor helps detect water contamination in the fuel system, ensuring reliable engine performance and protecting critical fuel components.

  • Compatible with Chevrolet Express 2500, Express 3500, GMC Savana 2500, Savana 3500, Sierra 2500 HD, Sierra 2500 HD Classic, Sierra 3500, Sierra 3500 Classic, Silverado 2500 HD, Silverado 2500 HD Classic, Silverado 3500, Silverado 3500 Classic, and Silverado 3500 HD
  • Connector gender: Male with a single plug-in connector
  • Terminal gender: Female with two blade terminals
  • Designed specifically for diesel fuel systems
  • Part number FWSS101 for precise identification and fitment

Technical Details and Attributes

The FWSS101 sensor features a male connector with one plug-in type connection, ensuring secure and straightforward installation. It includes two female blade terminals that provide reliable electrical contact within the fuel system. This sensor is engineered exclusively for diesel fuel applications, making it suitable for heavy-duty Chevrolet and GMC vehicles listed in the fitment. The part number FWSS101 corresponds to this exact configuration, facilitating accurate replacement and compatibility.

Purpose and Common Applications

This Water In Fuel sensor is used to monitor the presence of water in diesel fuel, which can cause engine performance issues and damage fuel system components. It is commonly installed in the following vehicles:

  • Chevrolet Express 2500 and 3500 series
  • GMC Savana 2500 and 3500 series
  • Chevrolet and GMC Sierra 2500 HD and 3500 HD models
  • Chevrolet Silverado 2500 HD and 3500 HD models

Typical issues addressed by this sensor include:

  • Detection of water contamination in diesel fuel
  • Prevention of fuel injector damage
  • Reduction of engine misfires caused by contaminated fuel
  • Protection of fuel pump components
  • Maintaining optimal engine performance and longevity

Installation Notes and Tips

  • Ensure the vehicle is turned off and cooled before installation
  • Locate the existing Water In Fuel sensor on the fuel filter assembly or fuel line
  • Disconnect the male plug-in connector carefully to avoid damage
  • Connect the new FWSS101 sensor, ensuring the two female blade terminals are properly seated
  • Verify secure connections and test for proper sensor operation after installation

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications for fit, form, and function. The FWSS101 Water In Fuel sensor undergoes rigorous quality control to ensure durability and reliable performance in diesel fuel systems. Warranty coverage details should be confirmed with the product documentation or supplier, as they may vary by region and application.

BrandStandard Ignition
Part NumberFWSS101
Connector GenderMale
Connector TypePlug In
Fuel TypeDiesel
Terminal GenderFemale
Terminal TypeBlade

This part fits 52 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2011ChevroletSilverado 2500 HD6.6LV8N/A
2011ChevroletSilverado 3500 HD6.6LV8N/A
2011GMCSierra 2500 HD6.6LV8N/A
2011GMCSierra 3500 HD6.6LV8N/A
2010ChevroletSilverado 2500 HD6.6LV8N/A
2010ChevroletSilverado 3500 HD6.6LV8N/A
2010GMCSierra 2500 HD6.6LV8N/A
2010GMCSierra 3500 HD6.6LV8N/A
2009ChevroletSilverado 2500 HD6.6LV8N/A
2009ChevroletSilverado 3500 HD6.6LV8N/A
2009GMCSierra 2500 HD6.6LV8N/A
2009GMCSierra 3500 HD6.6LV8N/A
2008ChevroletSilverado 2500 HD6.6LV8N/A
2008ChevroletSilverado 3500 HD6.6LV8N/A
2008GMCSierra 2500 HD6.6LV8N/A
2008GMCSierra 3500 HD6.6LV8N/A
2007ChevroletSilverado 2500 HD6.6LV8N/A
2007ChevroletSilverado 2500 HD Classic6.6LV8N/A
2007ChevroletSilverado 3500 Classic6.6LV8N/A
2007ChevroletSilverado 3500 HD6.6LV8N/A
2007GMCSierra 2500 HD6.6LV8N/A
2007GMCSierra 2500 HD Classic6.6LV8N/A
2007GMCSierra 3500 Classic6.6LV8N/A
2007GMCSierra 3500 HD6.6LV8N/A
2006ChevroletExpress 25006.6LV8N/A
2006ChevroletExpress 35006.6LV8N/A
2006ChevroletSilverado 2500 HD6.6LV8N/A
2006ChevroletSilverado 35006.6LV8N/A
2006GMCSavana 25006.6LV8N/A
2006GMCSavana 35006.6LV8N/A
2006GMCSierra 2500 HD6.6LV8N/A
2006GMCSierra 35006.6LV8N/A
2005ChevroletSilverado 2500 HD6.6LV8N/A
2005ChevroletSilverado 35006.6LV8N/A
2005GMCSierra 2500 HD6.6LV8N/A
2005GMCSierra 35006.6LV8N/A
2004ChevroletSilverado 2500 HD6.6LV8N/A
2004ChevroletSilverado 35006.6LV8N/A
2004GMCSierra 2500 HD6.6LV8N/A
2004GMCSierra 35006.6LV8N/A
2003ChevroletSilverado 2500 HD6.6LV8N/A
2003ChevroletSilverado 35006.6LV8N/A
2003GMCSierra 2500 HD6.6LV8N/A
2003GMCSierra 35006.6LV8N/A
2002ChevroletSilverado 2500 HD6.6LV8N/A
2002ChevroletSilverado 35006.6LV8N/A
2002GMCSierra 2500 HD6.6LV8N/A
2002GMCSierra 35006.6LV8N/A
2001ChevroletSilverado 2500 HD6.6LV8N/A
2001ChevroletSilverado 35006.6LV8N/A
2001GMCSierra 2500 HD6.6LV8N/A
2001GMCSierra 35006.6LV8N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

126392772-950015S8215600298771-367176919800-25001904-110FSS101FSSA1HTS110

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.