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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) >> Installation Procedure

Installation 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.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  1. If required, install the fuel composition sensor to the bracket and install the bolts.

    Tighten:  Tighten bolts to 10 N.m (89 lb in).

  2. Install the fuel composition sensor.
  3. Install the fuel composition sensor nuts.

    Tighten:  Tighten nuts to 17 N.m (13 lb ft).

    4. Fig 1: Fuel Composition Sensor & Nuts
    GM855738Courtesy of GENERAL MOTORS CORP.
  4. Connect the fuel pipes to the fuel composition sensor. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  5. Install the fuel line retainers (1).
    6. Fig 2: Fuel Line Retainers
    GM1224305Courtesy of GENERAL MOTORS CORP.
  6. Connect the fuel composition sensor electrical connector.
    7. Fig 3: Fuel Composition Sensor Electrical Connector
    GM1239281Courtesy of GENERAL MOTORS CORP.
  7. Lower the vehicle.
  8. Use the following procedure in order to inspect for leaks:
    1. Turn the ignition ON, with the engine OFF, for 2 seconds.
    2. Turn the ignition OFF for 10 seconds.
    3. Turn the ignition ON, with the engine OFF.
    4. Inspect for fuel leaks.
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