Walker 243-1001 Flex Fuel Sensor

Walker Flex Fuel Sensor 243-1001

Walker Products 243-1001 is a flex fuel sensor for select GM trucks and SUVs from 2000-2005. It is built for fuel system and engine management applications where accurate ethanol content and fuel composition data are required for proper operation.

Key Features

• Flex fuel sensor for air and fuel delivery systems
• Walker Products engine sensor line backed by in-house manufacturing and engineering support
• Manufactured to meet or exceed OEM standards and specifications
• ISO 9001/IATF16949 certified production environment
• Direct application coverage for Chevrolet Silverado 1500, Suburban 1500, Tahoe, S10, GMC Sierra 1500, Yukon, Yukon XL 1500, and Sonoma

Application Details

This Walker Products flex fuel sensor is used in vehicles that rely on fuel composition feedback for engine control. It fits 2002-2005 Chevrolet Silverado 1500, 2002-2005 Chevrolet Suburban 1500, 2002-2005 Chevrolet Tahoe, 2002-2005 GMC Sierra 1500, 2002-2005 GMC Yukon, 2002-2005 GMC Yukon XL 1500, 2000-2002 Chevrolet S10, and 2000-2002 GMC Sonoma. Part number 243-1001 is also cross-referenced with Standard Ignition FFS1 for the same application.

What This Sensor Helps Address

• Incorrect fuel composition readings
• Check engine light concerns related to flex fuel sensor performance
• Rough running caused by inaccurate ethanol content data
• Fuel delivery control issues in flex-fuel equipped GM applications
• Driveability problems tied to sensor signal loss or degradation

Installation Notes

Verify the vehicle application by year, make, and model before installation. Confirm connector style, mounting location, and fuel system configuration against the original sensor. For best results, inspect related wiring and fuel system components during replacement and clear diagnostic trouble codes after installation if required.

Quality Assurance

Walker Products has supplied fuel system components and engine sensors since 1946. The brand supports its parts with manufacturing, product management, engineering, and technical documentation resources, and produces this sensor under ISO 9001/IATF16949 certified quality systems. Part number 243-1001 is built for OE-style fitment and application accuracy.