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Home >> Cadillac >> 2011 >> STS RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 3.6L - Repair Instructions >> Repair Instructions >> Fuel Tank Replacement >> Removal Procedure

Removal Procedure

WARNING:

Refer to Gasoline/Gasoline Vapors Warning .

  1. Drain the fuel tank. Refer to Fuel Tank Draining .
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief (High Pressure Pump) .
  3. Remove the exhaust system. Refer to Exhaust System Replacement .
  4. Remove the rear propeller shaft. Refer to Rear Propeller Shaft Replacement (Rear Wheel Drive) , Rear Propeller Shaft Replacement (All Wheel Drive) .
    5. Fig 1: Frame-To-Body Mounting Bolts & Washers
    GM708181Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not remove any components from the rear frame assembly once the rear frame assembly is removed from the vehicle.

  5. Remove the rear frame assembly (2). Refer to Rear Frame Replacement .
    6. Fig 2: Identifying Fuel Filler Hose To Fuel tank
    GM785808Courtesy of GENERAL MOTORS COMPANY
  6. Disconnect the filler hose (1) from the fuel tank.
  7. Disconnect the filler vent tube (2) from the evaporative emission (EVAP) hose. Refer to Plastic Collar Quick Connect Fitting Service .
    8. Fig 3: Identifying Fuel Feed Pipe And EVAP Hose
    GM1994076Courtesy of GENERAL MOTORS COMPANY
  8. Disconnect the fuel feed pipe (1) from the chassis bundle. Refer to Plastic Collar Quick Connect Fitting Service .
  9. Disconnect the fuel EVAP hose (2) from the chassis bundle. Refer to Plastic Collar Quick Connect Fitting Service .
    10. Fig 4: View Of Fuel Tank Electrical Connector
    GM801228Courtesy of GENERAL MOTORS COMPANY
  10. Release the electrical connector interlock and disconnect the fuel tank electrical connector.
  11. Remove the fuel tank electrical connector retainer from the chassis.
  12. Remove the fuel tank electrical harness from the chassis mounted retainer.
    13. Fig 5: Identifying EVAP Hoses At EVAP Canister
    GM785817Courtesy of GENERAL MOTORS COMPANY
  13. Disconnect the EVAP hoses from the EVAP canister.
  14. Pull outward on the retainer tab in order to disengage the retainer from the chassis.
    15. Fig 6: View Of Fuel Tank Pressure Sensor Electrical Connector
    GM1558059Courtesy of GENERAL MOTORS COMPANY
  15. Disconnect the electrical connector from the fuel tank pressure sensor (1).
  16. Disconnect the electrical connector from the EVAP canister vent valve.
    17. Fig 7: View Of Fuel Tank Straps
    GM785806Courtesy of GENERAL MOTORS COMPANY
  17. Support the fuel tank with a suitable jack.
  18. Remove the fuel tank strap bolts.
  19. Remove the fuel tank straps.
    20. NOTE:

    Ensure the following are free from the surrounding components while lowering the fuel tank:

    • The fuel tank wiring harness
    • The EVAP wiring harness
    • The EVAP hoses at the EVAP
    • The fuel/EVAP hoses at the chassis pipes
  20. With the aid of an assistant, carefully lower the fuel tank from the vehicle.
  21. Remove the following components if replacing just the fuel tank:
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