2004 Cadillac CTS VFACTORY OEM SERVICE PROCEDURE

Installation Procedure

    Fig 1: Noting Location Of Fuel Rail Ground Strap On Intake Manifold
    GM260133Courtesy of GENERAL MOTORS CORP.
  1. If previously removed, install the fuel injectors. Refer to Fuel Injector Replacement .
  2. Note the location of the fuel rail ground strap (1) on the intake manifold. The fuel rail ground strap must be installed during assembly.
    3. Fig 2: Fuel Rail Assembly & Bolts
    GM222050Courtesy of GENERAL MOTORS CORP.
  3. Lubricate the new lower injector O-ring seals with clean engine oil.
  4. Install the new O-ring seals on the spray tip end of each injector.
    5. CAUTION: The fuel rail stop bracket must be installed onto the engine assembly. The stop bracket serves as a protective shield for the fuel rail in the event of a vehicle frontal crash. If the fuel rail stop bracket is not installed and the vehicle is involved in a frontal crash, fuel could be sprayed possibly causing a fire and personal injury from burns.
  5. Install the fuel rail assembly to the intake manifold.
  6. Apply a 5 mm (0.02 in) band of GM P/N 12345382 (Canadian P/N 10953489) threadlock or equivalent to the threads of the fuel rail bolts.
    7. NOTE: Refer to Fastener Notice in Cautions and Notices.
  7. Install the fuel rail attaching bolts.

    Tighten:  Tighten the fuel rail attaching bolts to 10 N.m (89 lb in).

    8. Fig 3: Installing Fuel Injector Wire Harness Retainers To Fuel Rail
    GM187335Courtesy of GENERAL MOTORS CORP.
  8. Install the fuel injector wire harness retainers to the fuel rail.
  9. Connect the injector electrical connectors.
    • Install each connector on the proper injector in order to ensure the correct sequential injector firing order.
    • Rotate the injectors as required in order to avoid stretching the injector wiring harness.
    10. Fig 4: Installing EVAP Line To Vehicle
    GM1392565Courtesy of GENERAL MOTORS CORP.
  10. Install the EVAP line to the vehicle.
  11. Connect the EVAP line to the EVAP valve. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
  12. Connect the EVAP line to the chassis EVAP line (1). Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
  13. Install the engine compartment fuel pipe (3). Refer to Fuel Hose/Pipes Replacement - Engine Compartment .
  14. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  15. Perform the following procedure in order to inspect for leaks:
    1. Turn the ignition switch ON for 2 seconds.
    2. Turn the ignition switch OFF for 10 seconds.
    3. Turn the ignition switch ON.
    4. Inspect for fuel leaks.
    Fig 5: Installing Fuel Injector Sight Shield
    GM1392497Courtesy of GENERAL MOTORS CORP.
  16. Install the fuel injector sight shield.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.