I have a high alcohol reading and was told to change the flex fuel sensor and I can't seem to find it anywhere under the truck by the fuel lines. Any helpful hints?
What is the engine size of your Silverado? Starting in 2006 some vehicles no longer use a fuel composition sensor or flex fuel sensor. They use the HO2 sensors and software to calculate the ethanol to gasoline ratio. The proper fill-up procedure must be followed so the software recognizes a refill event and performs a recalculation of the ethanol to gasoline ratio. To identify the flex-fuel vehicles look for the stainless steel fuel pressure regulator and fuel rail along with the stainless steel fuel supply and return pipes. They use different fuel pump and injectors are to withstand the chemical properties of up to 85% ethanol fuel (E85).
36.2k questions
32.2k answers
1.3k comments
22.8k users