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Fuel Composition Sensor (Flex-Fuel): Removal

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Relieve the fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE  under FUEL SYSTEMS. Raise and support the vehicle. Remove the fuel line retainers.
  2. Disconnect the fuel composition sensor fuel pipes. See FUEL LINE DISCONNECT FITTINGS  under FUEL SYSTEMS. See Figure. Disconnect the fuel composition sensor electrical connector.
  3. Remove the fuel composition sensor nuts. Remove the fuel composition sensor. If required, remove the fuel composition sensor bolts and remove the sensor from the bracket.
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