Escalade, Suburban, Tahoe, Yukon, Denali, DenaliXL, YukonXL 1999-2005

Fuel Filter/Water Separator

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Draining Water



6.5L Engine
  1. Turn OFF the engine and apply the parking brake.

    Click image to see an enlarged view

    Fig. Water drain valve assembly-6.5L Diesel

  2.  
  3. Place a suitable container under the filter drain hose.
  4.  
  5. Open the filter drain valve.
  6.  
  7. Start the engine and allow it to idle for one minute or until clear fuel is observed. A scan tool can also be used to turn the fuel pump on.
  8.  
  9. Close the filter drain valve (3) and stop the engine.
  10.  
  11. Dispose of the drained mixture in a proper manner.
  12.  
  13. If the Water In Fuel lamp comes on again, repeat procedure until all of the water is removed.
  14.  

  1. Turn OFF the engine and apply the parking brake.
  2.  
  3. Place a suitable container under the filter drain hose.
  4.  
  5. Open the filter drain valve.

    Click image to see an enlarged view

    Fig. Water drain valve-6.5L engine

  6.  
  7. Start the engine and allow it to idle for one minute or until clear fuel is observed. A scan tool can also be used to turn the fuel pump on.
  8.  
  9. Close the filter drain valve and stop the engine.
  10.  
  11. Dispose of the drained mixture in a proper manner.
  12.  
  13. If the Water In Fuel lamp comes on again, repeat procedure until all of the water is removed.
  14.  

6.6L Engine
  1. Attach a small piece of hose to the drain cock onto the water-in-fuel sensor.

    Click image to see an enlarged view

    Fig. Attach a hose to the drain cock onto the water-in-fuel sensor

  2.  
  3. Place an approved fuel-resistant container under the fuel filter.
  4.  
  5. Open the drain cock 3 or 4 turns or until the water contaminated fuel seeps from the drain cock.

    Click image to see an enlarged view

    Fig. Open the drain cock until the water contaminated fuel seeps from the drain cock

  6.  
  7. Operate the priming pump until only diesel fuel is visible. Allow the pump to return upward between pushes.

    Click image to see an enlarged view

    Fig. Operate the priming pump until only diesel fuel is visible

  8.  
  9. Tighten the drain cock.
  10.  
  11. Remove the container and hose.
  12.  

 
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