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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 973 (Engine Controls - 4.8L, 5.3L, & 6.0L (Introduction)) >> Repair Instructions >> Fuel Composition Sensor Replacement (5.3L (L59) Engine) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 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. Refer to Fuel Pressure Relief Procedure .
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Disconnect the fuel composition sensor electrical connector.
    4. Fig 1: Fuel Composition Sensor Electrical Connector
    GM1239281Courtesy of GENERAL MOTORS CORP.
  4. Remove the fuel line retainers (1).
    5. Fig 2: Fuel Line Retainers
    GM1224305Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the fuel pipes from the fuel composition sensor. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  6. Remove the fuel composition sensor nuts.
  7. Remove the fuel composition sensor.
    8. Fig 3: Fuel Composition Sensor & Nuts
    GM855738Courtesy of GENERAL MOTORS CORP.
  8. If required, remove the fuel composition sensor bolts and remove the sensor from the bracket.
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