Question about 2005 Chevrolet Suburban

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Where is the Fuel Composition Sensor located on 2005 chevy suburban

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Its located underneath the truck on the drivers side in front of the fuel filter.

Posted on Dec 22, 2014

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Never heard of it? maybe called something else? could you descirbe what it's function is?

Posted on Dec 09, 2014

  • willy15 Dec 09, 2014

    It's for flex fuel vehicles

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It is mounted on the driver side inner frame to cross member.

Posted on Dec 09, 2014

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Instructions to replace fuel composition sensor


  1. Turn OFF the ignition.
  2. Relieve the fuel pressure
  3. Remove the fuel composition sensor FCS attachment nut.
  4. Remove the 2 FCS attachment bolts.
  5. Remove the FCS from the frame rail.
  6. Disconnect the FCS inlet and outlet pipes from the FCS.
  7. Disconnect the FCS electrical connector.
Installation Procedure


  1. Connect the FCS inlet and outlet pipes to the FCS.
  2. Connect the FCS electrical connector.
  3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  4. Install the attaching nut.
  5. Tighten
    Tighten the nut to 17 N·m (12.5 lb ft)
  6. Install the 2 FCS attachment bolts.
  7. Tighten
    Tighten the bolts to 17 N·m (12.5 lb ft)

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Were is the fuel Filter


LOCATION OF FILTER IS DRIVER SIDE FRAME RAIL ABOUT AT DRIVER DOOR HARD TO SEE BUT FALLOW FUEL LINE ITS THERE. hOPE THIS HELPS PLEASE RATE ME !! THANK YOU AND GOOD LUCK

TOOLS Are Simple and inexpensive local Parts Store like AutoZone will Have it

FUEL FILTER REPLACEMENT

TOOLS REQUIRED
J-46363 Fuel Line Release Tool

REMOVAL PROCEDURE

  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure.
  2. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
  3. Remove the fuel composition sensor bracket nuts.Reposition the fuel composition sensor/bracket off to the side
    1. Using a flare nut wrench and backup wrench disconnect the fuel line fitting from the fuel filter.
    2. Pull the quick connect fitting back until the internal retainers hit the filter stop.
    3. Twist one end of J-46363 and insert it between the fitting and the filter.
    4. Twist the opposite end of J-46363 and insert it between the fitting and filter.
    5. Once J-46363 is inserted, ensure that J-46363 is parallel to the filter and fitting.
      1. While holding the filter, push the fitting towards the filter in order to disconnect the quick connect fitting.
      2. Remove the fitting from the filter.
      3. Remove J-46363 from the filter.
        1. Remove the fuel filter from the bracket.
        INSTALLATION PROCEDURE
      4. Install the NEW fuel filter to the bracket.While holding the filter, push the fitting towards the filter in order to connect the quick connect fitting
      5. Using a flare nut wrench and backup wrench connect the fuel line fitting to the fuel filter.
        1. Position the fuel composition sensor/bracket into place. NOTE: Refer to Fastener Notice in Service Precautions.
        2. Install the fuel composition sensor bracket nuts. Tighten the nuts to 17 N.m (13 lb ft) .
        3. Lower the vehicle.

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PO179 CODE


P0179 Fuel Composition Sensor Circuit High Input. May have got some bad fuel somewhere. I would erase your codes and see if it comes back. If it does I would take your vehicle to the stealership to have it diagnosed a little further. Thanks for using fixya.

Sincerely,

IC

Jan 08, 2009 | 2002 Chevrolet Suburban

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