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Standard Ignition FLS-121 Washer Fluid Level SensorOE Quality 60-Day Returns
Part #: FLS-121

Standard Ignition FLS-121 Washer Fluid Level Sensor

137 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Cadillac, Chevrolet, and GMC, Escalade, Escalade ESV, Silverado 2500 HD, Silverado 3500 HD, Suburban 1500, Tahoe, Sierra 2500 HD, Sierra 3500 HD, Yukon, Yukon XL 1500, Escalade EXT, Avalanche, Silverado 1500, Suburban 2500, Sierra 1500, Yukon XL 2500, Silverado 1500 HD Classic, Silverado 3500, Sierra 1500 HD Classic, Sierra 3500 Classic, Avalanche 1500, and Avalanche 2500
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Not what you need? See all Washer Fluid Level Sensor options

Washer Fluid Level Sensor for OE-Style Replacement

Standard Ignition FLS-121 is a direct-fit washer fluid level sensor for vehicles equipped with a windshield washer reservoir level monitor. It is built with quality materials for demanding underhood conditions and is engineered for straightforward installation in the original sensor location.

This washer fluid level sensor is a practical replacement for Cadillac Escalade, Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, and related applications where the washer fluid warning system is not reading correctly. Standard Ignition FLS-121 helps restore accurate fluid level detection without changing the factory setup.

Key Features

  • Direct-fit OE replacement washer fluid level sensor
  • Female connector with male blade terminals
  • 2-terminal electrical connection
  • Built from materials suited for harsh operating conditions
  • Tested for reliability during manufacturing
  • Fits a wide range of GM trucks and SUVs from 2006-2014

Detailed Description

Standard Ignition FLS-121 is a washer fluid level sensor designed to match the original equipment fit and function on select Cadillac, Chevrolet, and GMC vehicles. The sensor uses a female connector, male blade terminals, and a 2-terminal layout to support a factory-style electrical connection. It is a solid choice for drivers looking for a replacement washer fluid level sensor for 2006-2014 Cadillac Escalade and Escalade ESV, 2007-2014 Chevrolet Silverado 2500 HD and Silverado 3500 HD, and 2007-2014 GMC Sierra 2500 HD and Sierra 3500 HD applications.

This part cross-references Four Seasons 75145 for the same application.

What It Helps Fix

  • Washer fluid warning light stays on
  • Washer fluid level reading is inaccurate
  • Intermittent or failed reservoir level signal
  • Corrosion or wear at the original sensor connection
  • Replacement needs on GM truck and SUV washer reservoirs

Installation Notes and Tips

Verify connector style, terminal type, and reservoir sensor location before installation. This part is intended for direct replacement in the original washer fluid level sensor position, with no fitment listed by side or axle position. Confirm vehicle application by year, make, and model, including 2006-2014 Chevrolet Tahoe, 2006-2014 GMC Yukon, and 2006-2014 Cadillac Escalade applications.

Quality Assurance

Standard Ignition states that this sensor is manufactured with complete quality control throughout the production process and is tested for reliability before release. The part is built as an OE-style replacement for consistent fit and dependable operation.

BrandStandard Ignition
Part NumberFLS-121
Connector GenderFemale
ContentsFluid Level Sensor
Terminal GenderMale
Terminal TypeBlade

This part fits 137 vehicles. Search below:

YearMakeModelPositionNotes
2014CadillacEscaladeN/A
2014CadillacEscalade ESVN/A
2014ChevroletSilverado 2500 HDN/A
2014ChevroletSilverado 3500 HDN/A
2014ChevroletSuburban 1500N/A
2014ChevroletTahoeN/A
2014GMCSierra 2500 HDN/A
2014GMCSierra 3500 HDN/A
2014GMCYukonN/A
2014GMCYukon XL 1500N/A
2013CadillacEscaladeN/A
2013CadillacEscalade ESVN/A
2013CadillacEscalade EXTN/A
2013ChevroletAvalancheN/A
2013ChevroletSilverado 1500N/A
2013ChevroletSilverado 2500 HDN/A
2013ChevroletSilverado 3500 HDN/A
2013ChevroletSuburban 1500N/A
2013ChevroletSuburban 2500N/A
2013ChevroletTahoeN/A
2013GMCSierra 1500N/A
2013GMCSierra 2500 HDN/A
2013GMCSierra 3500 HDN/A
2013GMCYukonN/A
2013GMCYukon XL 1500N/A
2013GMCYukon XL 2500N/A
2012CadillacEscaladeN/A
2012CadillacEscalade ESVN/A
2012CadillacEscalade EXTN/A
2012ChevroletAvalancheN/A
2012ChevroletSilverado 1500N/A
2012ChevroletSilverado 2500 HDN/A
2012ChevroletSilverado 3500 HDN/A
2012ChevroletSuburban 1500N/A
2012ChevroletSuburban 2500N/A
2012ChevroletTahoeN/A
2012GMCSierra 1500N/A
2012GMCSierra 2500 HDN/A
2012GMCSierra 3500 HDN/A
2012GMCYukonN/A
2012GMCYukon XL 1500N/A
2012GMCYukon XL 2500N/A
2011CadillacEscaladeN/A
2011CadillacEscalade ESVN/A
2011CadillacEscalade EXTN/A
2011ChevroletAvalancheN/A
2011ChevroletSilverado 1500N/A
2011ChevroletSilverado 2500 HDN/A
2011ChevroletSilverado 3500 HDN/A
2011ChevroletSuburban 1500N/A
2011ChevroletSuburban 2500N/A
2011ChevroletTahoeN/A
2011GMCSierra 1500N/A
2011GMCSierra 2500 HDN/A
2011GMCSierra 3500 HDN/A
2011GMCYukonN/A
2011GMCYukon XL 1500N/A
2011GMCYukon XL 2500N/A
2010CadillacEscaladeN/A
2010CadillacEscalade ESVN/A
2010CadillacEscalade EXTN/A
2010ChevroletAvalancheN/A
2010ChevroletSilverado 1500N/A
2010ChevroletSilverado 2500 HDN/A
2010ChevroletSilverado 3500 HDN/A
2010ChevroletSuburban 1500N/A
2010ChevroletSuburban 2500N/A
2010ChevroletTahoeN/A
2010GMCSierra 1500N/A
2010GMCSierra 2500 HDN/A
2010GMCSierra 3500 HDN/A
2010GMCYukonN/A
2010GMCYukon XL 1500N/A
2010GMCYukon XL 2500N/A
2009CadillacEscaladeN/A
2009CadillacEscalade ESVN/A
2009CadillacEscalade EXTN/A
2009ChevroletAvalancheN/A
2009ChevroletSilverado 1500N/A
2009ChevroletSilverado 2500 HDN/A
2009ChevroletSilverado 3500 HDN/A
2009ChevroletSuburban 1500N/A
2009ChevroletSuburban 2500N/A
2009ChevroletTahoeN/A
2009GMCSierra 1500N/A
2009GMCSierra 2500 HDN/A
2009GMCSierra 3500 HDN/A
2009GMCYukonN/A
2009GMCYukon XL 1500N/A
2009GMCYukon XL 2500N/A
2008CadillacEscaladeN/A
2008CadillacEscalade ESVN/A
2008CadillacEscalade EXTN/A
2008ChevroletAvalancheN/A
2008ChevroletSilverado 1500N/A
2008ChevroletSilverado 2500 HDN/A
2008ChevroletSilverado 3500 HDN/A
2008ChevroletSuburban 1500N/A
2008ChevroletSuburban 2500N/A
2008ChevroletTahoeN/A
2008GMCSierra 1500N/A
2008GMCSierra 2500 HDN/A
2008GMCSierra 3500 HDN/A
2008GMCYukonN/A
2008GMCYukon XL 1500N/A
2008GMCYukon XL 2500N/A
2007CadillacEscaladeN/A
2007CadillacEscalade ESVN/A
2007CadillacEscalade EXTN/A
2007ChevroletAvalancheN/A
2007ChevroletSilverado 1500N/A
2007ChevroletSilverado 1500 HD ClassicN/A
2007ChevroletSilverado 2500 HDN/A
2007ChevroletSilverado 3500N/A
2007ChevroletSilverado 3500 HDN/A
2007ChevroletSuburban 1500N/A
2007ChevroletSuburban 2500N/A
2007ChevroletTahoeN/A
2007GMCSierra 1500N/A
2007GMCSierra 1500 HD ClassicN/A
2007GMCSierra 2500 HDN/A
2007GMCSierra 3500 ClassicN/A
2007GMCSierra 3500 HDN/A
2007GMCYukonN/A
2007GMCYukon XL 1500N/A
2007GMCYukon XL 2500N/A
2006CadillacEscaladeN/A
2006CadillacEscalade ESVN/A
2006CadillacEscalade EXTN/A
2006ChevroletAvalanche 1500N/A
2006ChevroletAvalanche 2500N/A
2006ChevroletSuburban 1500N/A
2006ChevroletSuburban 2500N/A
2006ChevroletTahoeN/A
2006GMCYukonN/A
2006GMCYukon XL 1500N/A
2006GMCYukon XL 2500N/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:

15213911209993385S801871-365875145FF3090FLS694FLSA4

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

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