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Home >> Cadillac >> 2005 >> CTS V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 5.7L - Introduction >> Repair Instructions >> Fuel Tank Replacement >> Installation Procedure
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Installation Procedure

  1. Install the following components if fuel tank replacement was necessary:
    2. IMPORTANT: Ensure the following are properly routed while raising 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
    Fig 1: View Of Fuel Tank Straps
    GM785806Courtesy of GENERAL MOTORS CORP.
  2. With the aid of an assistant, carefully raise the fuel tank to the vehicle, aligning the filler neck with the filler hose.
    3. IMPORTANT: Ensure the fuel tank straps are not pressed into the fuel tank.
  3. Carefully bend the fuel tank straps back to their original form.
  4. Position the fuel tank straps around the rear frame and upward into position, aligning the holes in the straps with the threaded holes in the chassis.
    5. NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Install the fuel tank strap bolts.

    Tighten:  Tighten the fuel tank strap bolts to 50 N.m (37 lb ft).

    6. Fig 2: Identifying Fuel Filler Hose To Fuel tank
    GM785808Courtesy of GENERAL MOTORS CORP.
  6. Connect the filler hose (1) to the fuel tank.

    Tighten:  Tighten the fuel filler tube hose clamp (3) to 3.5 N.m (31 lb in).

  7. Connect the filler vent tube (2) to the EVAP hose. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
    8. Fig 3: Identifying EVAP Hoses At EVAP Canister
    GM785817Courtesy of GENERAL MOTORS CORP.
  8. Connect the EVAP hoses to the EVAP canister.
  9. Insert the retainer into the chassis and press inward on the tab to engage.
  10. Connect the electrical connector to the EVAP canister.
    11. Fig 4: View Of Fuel Tank Electrical Connector
    GM801228Courtesy of GENERAL MOTORS CORP.
  11. Connect the fuel tank electrical connector.
    12. Fig 5: View Of Fuel Filter And Quick-Connect Fittings
    GM1272549Courtesy of GENERAL MOTORS CORP.
  12. Refer to Quick Connect Fitting(s) Service (Metal Collar)  or Quick Connect Fitting(s) Service (Plastic Collar)  in order to connect the following to the chassis bundle:
    • The fuel feed hoses (3 and 4)
    • The fuel EVAP hose
    13. Fig 6: View Of Screw Jack Under Rear Frame
    GM801226Courtesy of GENERAL MOTORS CORP.
  13. Raise the rear frame using the screw jack.
  14. Install the 2 front bolts to the rear frame.

    Tighten:  Tighten the rear frame bolts to 265 N.m (195 lb ft).

  15. Remove the screw jack.
    16. Fig 7: Supporting Control Arm Using Support Fixture
    GM708375Courtesy of GENERAL MOTORS CORP.
  16. Position the screw jack (3) under the lower control arm in order to raise the lower control arms (2).
  17. Install the lower shock bolts (2).

    Tighten:  Tighten the lower shock bolts to 150 N.m (111 lb ft).

  18. Remove the screw jack (3).
  19. Install the propeller shaft. Refer to Propeller Shaft Replacement (Automatic Transmission) or Propeller Shaft Replacement (Manual Transmission) or Propeller Shaft Replacement (CTS-V) in Propeller Shaft.
  20. Install the exhaust system. Refer to Exhaust System Replacement (LP1) or Exhaust System Replacement (LY7) or Exhaust System Replacement (LS6) in Engine Exhaust.
  21. Refill the fuel tank.
  22. Inspect for fuel leaks.
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