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Home >> Oldsmobile >> 2003 >> Bravada AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Engine Controls - System & Component Testing - 4.3L) >> Fuel Systems >> Fuel System Cleaning >> Cleaning Procedures

Cleaning Procedures

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Sonoma, 2003 GMC Safari, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect negative battery cable.
  2. Relieve fuel system pressure. Refer to FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4.3L ASTRO, BLAZER, JIMMY CANADIAN, SAFARI, SONOMA & S10 PICKUP article.
  3. Drain fuel tank.
  4. Remove fuel tank.
  5. Remove fuel sender assembly.
  6. Inspect fuel strainer. Replace a contaminated strainer and inspect fuel pump.
  7. Inspect fuel pump inlet for dirt and debris. Replace fuel pump if you find dirt or debris in fuel pump inlet.
    8. NOTE: When flushing fuel tank, handle fuel and water mixture as a hazardous material. Handle fuel and water mixture in accordance with all applicable local, state and federal laws and regulations.
  8. Flush fuel tank with hot water.
  9. Pour water out of fuel sender assembly opening.
  10. Rock the tank to be sure that removal of the water from tank is complete.
  11. Inspect the in-line fuel filter for contamination.
  12. Replace fuel filter, if plugged.
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