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Home › Pontiac › 2004 › Aztek Base, FWD › Repair and Diagnosis › External Pages › Different car › Section 120 (Engine Control System - 4.8L, 5.3L, & 6.0L - Introduction) › Repair Instructions › Fuel System Cleaning

Fuel System Cleaning

WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the fuel sender assembly. Refer to Fuel Sender Assembly Replacement .
  2. Inspect the fuel strainer. Replace the sender assembly if the strainer is contaminated.
  3. Inspect the fuel pump inlet for dirt and debris. Replace the sender assembly if dirt or debris is found in the fuel pump inlet.
    4. IMPORTANT: 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.
  4. Flush the fuel tank with hot water.
  5. Pour the water out of the fuel sender assembly opening. Rock the tank to be sure that removal of the water from the tank is complete.
  6. Install the fuel sender assembly. Refer to Fuel Sender Assembly Replacement .
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