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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1565 (Engine Control System & Fuel System - 4.8L, 5.3L, 6.0L, 6.2L - Repair Instructions) >> Repair Instructions >> Auxiliary Fuel Tank Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Auxiliary Fuel Tank & Bolts
    GM2100432Courtesy of GENERAL MOTORS CORP.
  1. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief (CH-48027) .
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Drain the fuel tank. Refer to Fuel Tank Draining .
  4. Remove the fuel tank shield bolts (1) and the fuel tank shield (2).
    5. Fig 2: View Of Auxiliary Fuel Tank Fill Pipe, Vent Pipe & Clamps
    GM2100438Courtesy of GENERAL MOTORS CORP.
  5. Loosen the fuel fill (1) and vent pipe (2) hose clamps.
  6. Disconnect the hoses.
    7. Fig 3: Identifying Auxiliary Fuel Tank & Straps
    GM2100530Courtesy of GENERAL MOTORS CORP.
  7. With the aid of an assistant, support the fuel tank.
  8. Disconnect the evaporative emissions lines and the fuel lines. Refer to Metal Collar Quick Connect Fitting Service  and Plastic Collar Quick Connect Fitting Service 
  9. Disconnect the electrical connectors.
  10. Remove the fuel tank strap bolts (1) and the auxiliary fuel tank (2).
  11. Remove the fuel pump module from the fuel tank. Refer to Fuel Tank Fuel Pump Module Replacement (25 Ext/Crew Cab With 26 Gal Tank)  or Fuel Tank Fuel Pump Module Replacement (15/25 Reg/Ext/Crw Cab With 34 Gal Tnk)  or Fuel Tank Fuel Pump Module Replacement (15 Ext/Crew Cab With 26 Gal Tank)  or Fuel Tank Fuel Pump Module Replacement (15 Reg Cab With 26 Gal Tank)  or Fuel Tank Fuel Pump Module Replacement (35 Reg/Ext/Crew Cab With 34 Gal Tank) .
  12. Cap the fuel and EVAP pipes in order to prevent possible fuel system contamination.
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