2005 Cadillac XLRFACTORY OEM SERVICE PROCEDURE

Installation Procedure

    NOTE:
    • Use care when servicing the fuel system components, especially the fuel injector electrical connectors, the fuel injector tips, and the injector O-rings. Plug the inlet and the outlet ports of the fuel rail in order to prevent contamination.
    • Do not use compressed air to clean the fuel rail assembly as this may damage the fuel rail components.
    • Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.
  1. Lubricate the new lower injector O-ring seals with clean engine oil.
  2. If replacing the fuel rail, install the fuel injectors. Refer to Fuel Injector Replacement .
  3. Install the new O-ring seals on the spray tip end of each injector.
    4. Fig 1: View Of Fuel Rail & Injector Assembly
    GM928165Courtesy of GENERAL MOTORS CORP.
  4. Install the fuel rail.
    5. NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Install the fuel rail attaching studs (2).

    Tighten:  Tighten the studs to 9 N.m (80 lb in).

    6. Fig 2: View Of Fuel Injector & Electrical Connectors
    GM490817Courtesy of GENERAL MOTORS CORP.
  6. Connect the fuel injector electrical connectors (1) to each fuel injector (2).
    7. Fig 3: View Of Fuel Rail Quick-Connect Fitting, Fuel Feed Hose & Chassis Fuel Feed Pipe
    GM931736Courtesy of GENERAL MOTORS CORP.
  7. Connect the fuel feed and return pipes (2, 3) to the fuel rail. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  8. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  9. Inspect for fuel leaks using the following procedures:
    1. Turn ON the ignition, with the engine OFF for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition, with the engine OFF.
    4. Inspect for fuel leaks.
  10. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
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.

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