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Where is the fuel composition sensor located on my 2005 Chevrolet Silverado 5.3L?

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Where is the fuel composition sensor located on my 2005 Chevrolet Silverado 5.3L? I got the engine code P0178

Vehicle: 2005 Chevrolet Silverado 5.3L

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P0178 Fuel composition sensor

 This is also known as flex fuel sensor, The location is right near the fuel tank, The main fuel feed lines go into this first before going into the fuel injectors.

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P0178 CHEVROLET Code - Fuel Composition Sensor Circuit Low Frequency
Read more: https://www.autocodes.com/p0178_chevrolet.html

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