GM Service Manual Online
For 1990-2009 cars only

Important: 

   • Only use oil-free compressed air in order to blow out the fuel pipes. If the fuel filter is plugged, the fuel tank should be inspected internally and cleaned if necessary.
   • When flushing the fuel tank, handle the fuel and water mixture as a hazardous material. Handle the fuel and water in accordance with all applicable local, state, and federal laws and regulations.
   • Whenever the fuel tank is cleaned, the fuel pump strainer must be inspected. If the fuel pump fuel strainer is contaminated, the fuel pump fuel strainer must be replaced, and the fuel pump must be inspected.
   • Always maintain cleanliness when servicing the fuel system components.

  1. Remove the fuel tank. Refer to Fuel Tank Replacement .
  2. Remove the fuel sender assembly. Refer to Fuel Sender Assembly Replacement .
  3. Inspect the fuel pump strainer for dirt and debris. Replace the fuel sender assembly if the fuel strainer is contaminated.
  4. Flush the fuel tank with hot water.
  5. Pour the water out of the fuel sender assembly opening in the fuel tank. Rock the fuel tank in order to be sure that the removal of the water from the fuel tank is complete.
  6. Install the fuel sender assembly. Refer to Fuel Sender Assembly Replacement .
  7. Install the fuel tank. Refer to Fuel Tank Replacement .
  8. Replace the fuel filter. Refer to Fuel Filter Replacement .