Removal Procedure

Fig 1: Identifying Engine Wiring Harness Connector & Fuel Injector Wiring Harness Connector

Courtesy of GENERAL MOTORS CORP.

Relieve the high side fuel system pressure. Refer to Fuel Pressure Relief (High Pressure Side) or Fuel Pressure Relief (Without CH 48027) or Fuel Pressure Relief (With CH 48027) .
Disconnect the engine wiring harness electrical connector (1) from the fuel injector wiring harness electrical connector.
Remove the intake manifold. Refer to Intake Manifold Replacement .

Fig 2: View Of Fuel Injector Insulator

Courtesy of GENERAL MOTORS CORP.

Fig 3: Identifying High Pressure Fuel Pump Connector & Clip

Courtesy of GENERAL MOTORS CORP.

Disconnect the engine wiring harness electrical connector (1) from the high pressure fuel pump.
Remove the intermediate fuel pipe. Refer to Fuel Feed Intermediate Pipe Replacement .

Fig 4: Identifying Fuel Rail & Bolts

Courtesy of GENERAL MOTORS CORP.

Disconnect the fuel injector wiring harness electrical connectors from the fuel injectors.
Remove the fuel rail bolts (1).

NOTE: Carefully remove the fuel rail. The fuel injectors may come out of the cylinder head with the fuel rail.

Carefully remove the fuel rail (2).
If the fuel injectors have been removed with the fuel rail, reinstall the injectors. Refer to Direct Fuel Injector Replacement .

Fig 5: View Of Fuel Injector Components

Courtesy of GENERAL MOTORS CORP.

Fig 6: View Of Fuel Rail Fuel Pressure Sensor

Courtesy of GENERAL MOTORS CORP.

NOTE: Applying force to the plastic housing of the sensor will destroy the sensor. To tighten or loosen, only apply force to the attached hexagon.

If replacing the fuel rail, remove the fuel injection fuel rail fuel pressure sensor.
Remove the fuel injector wiring harness.