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Home >> Cadillac >> 2009 >> CTS V, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.2L - Introduction >> Repair Instructions >> Fuel Tank Replacement >> Removal Procedure
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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 (Without CH 48027)  or Fuel Pressure Relief (With CH 48027) .
  3. Remove the muffler assembly. Refer to Exhaust Muffler Replacement (V8) .
  4. Remove the rear propeller shaft. Refer to Rear Propeller Shaft Replacement (RPO LP1/LY7) or Rear Propeller Shaft Replacement (RPO LSA) .
    5. Fig 1: Identifying Rear Frame Assembly
    GM708181Courtesy of GENERAL MOTORS CORP.
    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 & Filler Vent Tube
    GM785808Courtesy of GENERAL MOTORS CORP.
  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 Evaporative Emission System Hoses/Pipes Replacement .
    8. Fig 3: Identifying Fuel Feed Pipe & EVAP Hose
    GM1994076Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the fuel feed pipe (1) and fuel EVAP hose (2) from the chassis bundle. Refer to Fuel Hose/Pipes Replacement - Chassis .
    9. Fig 4: View Of Fuel Tank Electrical Connector
    GM801228Courtesy of GENERAL MOTORS CORP.
  9. Release the electrical connector interlock and disconnect the fuel tank electrical connector.
  10. Remove the fuel tank electrical connector retainer from the chassis.
  11. Remove the fuel tank electrical harness from the chassis mounted retainer.
    12. Fig 5: Identifying EVAP Hoses At EVAP Canister
    GM785817Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the EVAP hoses from the EVAP canister.
  13. Pull outward on the retainer tab in order to disengage the retainer from the chassis.
    14. Fig 6: View Of Fuel Tank Pressure Sensor Electrical Connector
    GM1558059Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the electrical connector from the fuel tank pressure sensor (1).
  15. Disconnect the electrical connector from the EVAP canister vent valve.
    16. Fig 7: View Of Fuel Tank Straps
    GM785806Courtesy of GENERAL MOTORS CORP.
  16. Support the fuel tank with a suitable jack.
  17. Remove the fuel tank strap bolts.
  18. Remove the fuel tank straps.
    19. 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
  19. With the aid of an assistant, carefully lower the fuel tank from the vehicle.
  20. Remove the following components if replacing just the fuel tank:
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