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.

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

Fig 1: Attaching A Small Piece Of Hose To The Drain Cock Onto The Water-In-Fuel Sensor

Courtesy of GENERAL MOTORS CORP.

Place an approved fuel-resistant container under the fuel filter.

Fig 2: Locating Water-In-Fuel Sensor Drain Cock

Courtesy of GENERAL MOTORS CORP.

Open the drain cock 3 or 4 turns or until the water contaminated fuel seeps from the drain cock.

Fig 3: Operating The Fuel Priming Pump

Courtesy of GENERAL MOTORS CORP.

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