GM GENUINE PARTS Flex Fuel Sensor 13507128 — OE Fit Ethanol Content Sensor, Direct Replacement

Designed and manufactured to General Motors original equipment specifications, the GM Genuine Parts 13507128 Flex Fuel Sensor replaces the factory unit in compatible GM flex-fuel vehicles. It measures ethanol concentration in the fuel and delivers a reliable sensor signal so the vehicle’s control systems can adapt fueling strategy and ignition timing. Because this is a GM-recommended replacement part, it's built for fit, durability, and performance comparable to the original component.

How does the flex fuel sensor affect engine performance?

The sensor provides the engine control module with accurate ethanol-content readings so the ECU can adjust air/fuel ratio and spark timing. Proper readings help the vehicle run smoothly across varying ethanol blends and can prevent drivability issues caused by incorrect fueling adjustments.

• Detects percentage of ethanol in gasoline blends.
• Sends continuous signals to the ECU for fuel trim adjustments.
• Helps maintain consistent idle, throttle response, and acceleration.

What makes this GM part different from aftermarket sensors?

This GM Genuine Parts sensor is manufactured to the same specifications used for original factory installation, ensuring fit and function match the vehicle’s design. Using an OE-replacement reduces the chance of compatibility problems and limits the need for reprogramming or adaptation.

• Built to GM OE fit, form, and function standards.
• Meets GM-recommended durability and performance expectations.
• Labeling and specifications aligned with GM service instructions.

How do I know when to replace the flex fuel sensor?

Signs a flex fuel sensor may need replacement include diagnostic trouble codes related to ethanol sensor faults, inconsistent engine behavior when fuel blends change, or failed emissions checks linked to fuel trim issues. A qualified technician can confirm sensor operation with a diagnostic scan and live data monitoring.

• Check-engine light with ethanol-sensor or fuel-trim codes.
• Irregular idling or hesitation correlated with fuel blend changes.
• Failed emissions or fuel-mixture-related diagnostics.

How easy is installation and compatibility information?

The 13507128 sensor is intended as a direct replacement for specified GM flex-fuel models, designed for straightforward installation where access is typical for the vehicle’s sensor location. Always confirm vehicle application by checking the part number and consulting the vehicle’s parts catalog or a GM service advisor.

• Direct-fit replacement for compatible GM flex-fuel vehicles.
• Install using standard automotive tools; some models may need lift access.
• Verify part number against vehicle VIN or parts catalog before purchase.

Who is this for: The GM Genuine Parts 13507128 Flex Fuel Sensor is aimed at owners and technicians maintaining GM flex-fuel vehicles who want a factory-spec replacement. It suits drivers who prioritize correct ECU inputs, reliable diagnostics, and OEM-level fit and longevity over lower-cost aftermarket options. If you need a sensor that matches original GM specifications for ethanol-content measurement and engine management compatibility, this part is intended for your vehicle.