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Fuel System Cleaning

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: When flushing the fuel tank, handle the fuel and water mixture as a hazardous material. Handle the fuel and water mixture in accordance with all applicable local, state and federal laws and regulations.
  1. Disconnect the negative battery cable. Relieve fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Drain fuel tank. Remove the fuel tank. See FUEL TANK . Remove fuel pump module. See FUEL TANK PUMP MODULE . Inspect the fuel strainer. Replace a contaminated strainer and inspect the fuel pump. Inspect the fuel pump inlet for dirt and debris. Replace the fuel pump if you find dirt or debris in the fuel pump inlet.
  2. Flush the fuel tank with hot water. Pour the water out of the fuel sender assembly opening. Rock the tank to ensure that removal of the water from the tank is complete. Inspect the fuel filter for contamination. Replace the fuel filter if the filter is plugged. See FUEL FILTER .
    3. NOTE: Only use oil-free compressed air to blow out the fuel pipes.
  3. Clean the fuel lines by applying air pressure in the opposite direction of the fuel flow. Install the fuel pump module with NEW seal into the fuel tank. Install the fuel tank. Turn ON the ignition for 2 seconds. Turn OFF the ignition for 10 seconds. Turn ON the ignition. Inspect for fuel leaks.
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