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Installation Procedure

IMPORTANT: Install new lower O-rings when reusing fuel injectors. Lubricate the injector tip O-rings prior to installing the injectors into the intake manifold.
  1. Install the fuel injectors, if necessary. Refer to Fuel Injector Replacement .
  2. With the fuel injectors positioned downward, lower the fuel injectors into the cylinder head ports.
  3. Carefully push the fuel injectors into the cylinder head ports.
    4. Fig 1: Fuel Rail Studs
    GM1578472Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  4. Install the fuel rail bolts.

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

    5. Fig 2: Fuel Injector Harness Electrical Connector
    GM1623764Courtesy of GENERAL MOTORS CORP.
  5. Connect the fuel injector harness electrical connector (3).
    6. Fig 3: Fuel Injector Harness Electrical Connector Clip
    GM1623549Courtesy of GENERAL MOTORS CORP.
  6. Install the fuel injector harness electrical connector clip (4) to the intake manifold.
    7. Fig 4: Fuel Feed Line Quick Connect Fitting
    GM1625417Courtesy of GENERAL MOTORS CORP.
  7. Connect the fuel feed line quick connect fitting to the fuel rail. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  8. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure .
  10. Inspect for fuel leaks using the following procedure:
    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.
    4. Inspect for fuel leaks.
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