Standard Ignition FFS3 Flex Fuel Sensor

Flex Fuel Sensor for GM Fuel System Service

The Standard Ignition FFS3 flex fuel sensor monitors ethanol content in gasoline blends so the engine control system can adjust fueling accurately. It is a direct-fit replacement for a wide range of Chevrolet, GMC, Buick, and Cadillac applications, including Silverado 1500, Tahoe, and Equinox models.

Built with a female oval connector, 2 ports, and 3 male blade terminals, this sensor supports reliable signal transfer in GM flex-fuel fuel delivery systems. The FFS3 is also a practical OE-style replacement for drivers searching for a flex fuel sensor for 2014-2021 Chevrolet Silverado 1500, 2014-2020 Chevrolet Tahoe, or 2011-2017 Chevrolet Equinox service.

Key Features

• Standard Ignition FFS3 flex fuel sensor for gasoline/ethanol blend monitoring
• Female oval connector with 3 male blade terminals for direct-fit service
• 2-port sensor design for fuel system integration
• Dual internal talc seal helps support durability and long service life
• Breathable Teflon membrane increases airflow to speed switch rate
• Stainless-steel shield helps protect the sensing element from thermal shock
• OE-style replacement for GM flex-fuel applications

Detailed Description

The Standard Ignition FFS3 is engineered for vehicles that rely on flex fuel sensing to determine ethanol content and maintain proper fuel delivery. Its internal sealing design, breathable membrane, and stainless-steel shield work together to support faster sensor response and stable operation in demanding fuel system conditions. This part cross-references Continental SE1004S for the same application.

Compatible With applications such as 2023-2024 Chevrolet Silverado 1500, 2021-2024 Chevrolet Silverado 2500 HD, 2021-2024 GMC Sierra 2500 HD, 2014-2020 Chevrolet Tahoe, and 2011-2017 Chevrolet Equinox, the FFS3 serves as a direct replacement for many GM flex-fuel platforms. It is also used on 2012-2018 Chevrolet Express 2500, 2012-2018 GMC Savana 3500, 2015-2020 GMC Yukon XL, and 2013 Cadillac ATS applications listed in the fitment data.

Common Issues This Part Can Address

• Incorrect ethanol content readings
• Check engine light related to fuel composition sensing
• Rough running caused by inaccurate fuel blend data
• Poor fuel economy from improper fueling adjustments
• Delayed sensor response in flex-fuel systems

Installation Notes and Tips

Verify connector shape, terminal count, and port configuration before installation. The FFS3 uses a female oval connector with 3 male blade terminals, so matching the electrical connection is important for proper fitment. Confirm vehicle application by year, make, and model before replacing the original sensor.

Fits 2023-2024 Chevrolet Silverado 1500, N/A; Fits 2014-2021 Chevrolet Silverado 1500, N/A; Fits 2021-2024 Chevrolet Silverado 2500 HD, N/A; Fits 2021-2024 GMC Sierra 2500 HD, N/A; Fits 2021-2024 GMC Sierra 3500 HD, N/A; Fits 2021-2023 Chevrolet Silverado 3500 HD, N/A; Fits 2022 Chevrolet Silverado 1500 LTD, N/A; Fits 2013-2020 Chevrolet Impala, N/A; Fits 2014-2020 Chevrolet Tahoe, N/A; Fits 2015-2020 GMC Yukon, N/A; Fits 2015-2020 GMC Yukon XL, N/A; Fits 2012-2018 Chevrolet Express 2500, N/A; Fits 2012-2018 Chevrolet Express 3500, N/A; Fits 2012-2018 GMC Savana 2500, N/A; Fits 2012-2018 GMC Savana 3500, N/A; Fits 2014-2018 GMC Sierra 1500, N/A; Fits 2011-2017 Chevrolet Caprice, N/A; Fits 2011-2017 Chevrolet Equinox, N/A; Fits 2012-2017 GMC Terrain, N/A; Fits 2013-2016 Buick LaCrosse, N/A; Fits 2014-2016 Chevrolet Impala Limited, N/A; Fits 2012-2015 Chevrolet Captiva Sport, N/A; Fits 2013 Buick Regal, N/A; Fits 2011 Buick Regal, N/A; Fits 2013 Cadillac ATS, N/A; Fits 2013 Cadillac SRX, N/A.

Quality Assurance

Standard Ignition maintains quality control throughout the manufacturing process, and the FFS3 is built to meet the demands of modern flex-fuel fuel delivery systems.