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Engine Controls - 6.6L (LB7) (Introduction): Maintenance Chevrolet Silverado 3500

Testing & Diagnostics ~131 words

Water-in-Fuel Draining Procedure

  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. Operate the priming pump until only diesel fuel is visible. Allow the pump to return upwards between pushes.
  5. Tighten the drain cock.
  6. Remove the container and hose.

Fuel Tank Draining Procedure

  1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure (Single Battery)»(ref-184144-S12006988322005082200000) or «Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery)»(ref-184144-S01033869922005082200000) in Engine Electrical.
  2. Remove the fuel fill cap.
  3. Using a hand or air operated pump drain as much fuel through the fuel fill pipe as possible.

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