ACDelco GM Genuine Parts Flex Fuel Sensors
The ACDelco GM Genuine Parts flex fuel sensor (Part Number 13507128) measures the ethanol content in the fuel. It reads the ethanol to gasoline ratio and provides accurate data that helps maintain proper engine performance when using blended fuels such as E85.
This sensor sends real time information to the vehicle’s ECM. As a result, the ECM adjusts the air fuel mixture for efficient combustion and smooth operation. Additionally, the sensor meets the fit and function standards required for vehicles with flex fuel capability.
In addition to its accuracy and durability, the ACDelco GM Genuine Parts Flex Fuel Sensor (Part Number 13507128) has key technical features for proper operation in flex fuel systems. All fuel passes through the sensor before reaching the fuel rail. It uses quick connect fittings for both the inlet and outlet.
The Flex Fuel Sensors also includes a three wire harness. This provides a battery positive voltage supply, a ground circuit, and a signal output to the ECM.
Inside the unit, a microprocessor measures the ethanol percentage and communicates this value through a frequency based signal. The signal typically operates between 50–150 Hz. The ECM provides a 5 volt internal pull up on the signal line. The Sensor pulls this voltage to ground in pulses to generate the frequency. This signal allows the ECM to adjust ignition timing and injection based on fuel composition.
At KYLETUNEDIT, we use this Flex Fuel Sensor in our kits. We recognize it as one of the most reliable and high quality sensors on the market. Its consistent accuracy and durable construction give users stable readings and optimal tuning results, which is why we continue to trust the ACDelco GM Genuine Parts Flex Fuel Sensors.
Dimensions
- Approx. 4.3 x 3.8 x 1.3 inches (10.9 x 9.7 x 3.3 cm).



