GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Fuel Injector Replacement

Removal Procedure

    Object Number: 537311 Size: SH

    Notice: Use care in removing the fuel injectors in order to prevent damage to the fuel injector electrical connector pins or the fuel injector nozzles. Do not immerse the fuel injector in any type of cleaner. The fuel injector is an electrical component and may be damaged by this cleaning method.

    Important: Important the fuel injector is serviced as a complete assembly only. If the fuel injectors are found to be leaking, the engine oil may be contaminated with fuel.

  1. Relieve fuel system pressure. Refer to Fuel Pressure Relief .
  2. Remove the upper intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical.
  3. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  4. Remove the fuel injector retaining clips (1).
  5. Remove the fuel injectors (3).
  6. Remove the fuel injector Upper O-ring (2).
  7. Remove the fuel injector lower O-ring (4).

Installation Procedure

    Object Number: 537311 Size: SH
  1. Install the fuel injector Upper O-ring (2).
  2. Install the fuel injector lower O-ring (4).
  3. Install the fuel injector (3) to fuel rail.
  4. Install the fuel injector retaining clips (1).
  5. Reinstall the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  6. Reinstall the upper intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical.
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  8. Inspect the fuel system for leaks by performing the following steps:
    9. 8.1. Turn ON the ignition, for 2 seconds.
    8.2. Then OFF the ignition, for 10 seconds.
    8.3. Turn ON the ignition.
    8.4. Inspect for fuel leaks.