Removal Procedure

Relieve the fuel system pressure. Refer to Fuel Pressure Relief (With CH 48027-100) or Fuel Pressure Relief (Without CH 48027-100) .
Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .

Fig 1: View Of Fuel Feed Pipe Retainer & Fuel Pipe Bracket

Courtesy of GENERAL MOTORS CORP.

Disconnect the fuel feed line (1) quick connect fitting from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
Disconnect the engine wiring harness electrical connector from the manifold absolute pressure (MAP) sensor.
Disconnect the fuel injector wiring harness electrical connector from the engine wiring harness electrical connector.

Fig 2: View Of Fuel Rail

Courtesy of GENERAL MOTORS CORP.

Remove the fuel injection fuel rail assembly bolts.

NOTE: Use care when removing the fuel injection fuel rail assembly in order to prevent damage to the fuel injector spray tips.

Pull the fuel injector fuel rail assembly back and upward in order to release the fuel injectors from the cylinder head ports.
Remove the fuel injection fuel rail assembly.

Fig 3: View Of Fuel Injector Tip Insulators

Courtesy of GENERAL MOTORS CORP.

NOTE: The fuel injector spray tips may be located on the fuel injectors or may still be located in the cylinder head ports. Either way, ensure that all 4 fuel injector spray tips are removed and discarded.

Remove and discard the fuel injector spray tips.

Fig 4: View Of Fuel Rai & Injectors

Courtesy of GENERAL MOTORS CORP.

Disconnect the fuel injector wiring harness electrical connectors from the fuel injectors.
Remove the fuel injector wiring harness clips from the fuel injection fuel rail assembly.
Remove the fuel injector wiring harness from the fuel injection fuel rail assembly.
Remove the fuel injectors, if necessary. Refer to Fuel Injector Replacement .