Walker 243-1003 Flex Fuel Sensor

Walker 243-1003 Flex Fuel Sensor

Walker Products 243-1003 is a flex fuel sensor for select GM vehicles that use ethanol-content monitoring in the fuel system. It is built to meet or exceed OEM standards and specifications, with engineering and product support backed by Walker Products’ in-house manufacturing and technical teams.

Compatible With select Chevrolet, GMC, Buick, and Cadillac applications, including Silverado 1500, Tahoe, Sierra 1500, Impala, Equinox, Terrain, Yukon, Yukon XL, LaCrosse, Caprice, Captiva Sport, Impala Limited, Regal, ATS, and SRX.

Key Features

• Flex fuel sensor for ethanol-content measurement in supported fuel systems
• OE-style replacement for select Chevrolet, GMC, Buick, and Cadillac vehicles
• Manufactured to meet or exceed OEM standards and specifications
• Backed by Walker Products engineering, product management, and technical support
• Walker Products 243-1003 cross-references Continental SE1004S and Standard Ignition FFS3 for the same application

Detailed Description

Walker Products has supplied fuel system components since 1946 and continues to produce engine management parts for the automotive aftermarket. The 243-1003 flex fuel sensor is part of the Walker Products line of fuel system and sensor components, built for vehicles that rely on accurate fuel composition data for proper engine operation. This part number is used across multiple GM platforms, including Chevrolet Impala, Silverado 1500, Tahoe, Equinox, and GMC Sierra 1500 applications.

Fits 2013-2018 Chevrolet Impala, N/A. Fits 2014-2018 Chevrolet Silverado 1500, N/A. Fits 2014-2018 Chevrolet Tahoe, N/A. Fits 2014-2018 GMC Sierra 1500, N/A. Fits 2012-2017 Chevrolet Caprice, N/A. Fits 2013-2017 Chevrolet Equinox, N/A. Fits 2013-2017 GMC Terrain, N/A. Fits 2015-2017 GMC Yukon, N/A. Fits 2015-2017 GMC Yukon XL, N/A. Fits 2013-2016 Buick LaCrosse, N/A. Fits 2014-2016 Chevrolet Impala Limited, N/A. Fits 2013-2015 Chevrolet Captiva Sport, N/A. Fits 2013 Buick Regal, N/A. Fits 2013 Cadillac ATS, N/A. Fits 2013 Cadillac SRX, N/A.

Common Uses

• Replacing a failed flex fuel sensor on supported GM vehicles
• Restoring accurate ethanol-content signal input to the engine management system
• Addressing fuel composition-related drivability concerns
• Correcting diagnostic trouble codes tied to flex fuel sensor performance
• Supporting proper fuel system operation in E85-capable applications

Installation Notes and Tips

Verify the vehicle application by year, make, and model before installation. Confirm the existing sensor connector, fuel system configuration, and OE part number match the application listed for Walker Products 243-1003. Follow the vehicle service information for fuel system depressurization, sensor replacement, and any required diagnostic clearing after installation.

Quality Assurance

Walker Products manufactures fuel system and engine sensor components to meet or exceed OEM standards and specifications. The company supports production with in-house engineering, product management, and technical documentation, and operates as an ISO 9001/IATF16949 certified manufacturer.