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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 976 (Engine Controls - 6.6L (Lb7) (Introduction)) >> Repair Instructions >> Water-in-Fuel Draining Procedure

Water-in-Fuel Draining 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. Attach a small piece of hose to the drain cock onto the water-in-fuel sensor.
  2. Place an approved fuel-resistant container under the fuel filter.
  3. Open the drain cock three or four turns or until the water contaminated fuel seeps from the drain cock.
    4. Fig 1: Water-In-Fuel Drain Cock
    GM1198929Courtesy of GENERAL MOTORS CORP.
  4. Operate the priming pump until only diesel fuel is visible. Allow the pump to return upwards between pushes.
    5. Fig 2: Operating Priming Pump
    GM1198930Courtesy of GENERAL MOTORS CORP.
  5. Tighten the drain cock.
  6. Remove the container and hose.
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