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Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 240 (Engine Controls - System & Component Testing - 4.2L) >> Fuel Systems >> Fuel System Cleaning >> Cleaning Procedures

Cleaning Procedures

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. 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 - 4.2L BRAVADA, ENVOY, ENVOY XL, TRAILBLAZER & TRAILBLAZER EXT article.
  3. Drain fuel tank.
  4. Remove fuel tank.
  5. Remove fuel sender assembly. Whenever the fuel tank is cleaned, fuel pump strainer must be inspected. If strainer is contaminated, replace strainer and fuel filter. Inspect fuel pump inlet for dirt and debris. If found, replace fuel sender and fuel filter.
  6. Flush fuel tank with hot water.
  7. Pour water out of fuel sender assembly opening.
  8. Rock tank to ensure that removal of water from tank is complete.
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