Removal Procedure

Fig 1: Identifying Fuel Rail Fuel Pressure Sensor

Courtesy of GENERAL MOTORS CORP.

Relieve the high side fuel system pressure. Refer to Fuel Pressure Relief (Low Pressure without Special Tool) or Fuel Pressure Relief (Low Pressure with CH 48027) or Fuel Pressure Relief (Low Pressure Side with CH 48027-100) or Fuel Pressure Relief (High Pressure Side) .
Disconnect the fuel injector wiring harness electrical connector (1) from the fuel injection fuel rail fuel pressure sensor.

Fig 2: View Of Fuel Rail Pressure Sensor & Foam Insulator

Courtesy of GENERAL MOTORS CORP.

NOTE: Do NOT reposition the foam insulator as damage to the insulator may occur.

Insert a 27 mm socket through the opening in the foam insulator (2) onto the fuel injection fuel rail fuel pressure sensor (1).

Fig 3: Identifying 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.

Place a clean shop towel under the fuel injection fuel rail pressure sensor to fuel rail location.
Remove and discard the fuel injection fuel rail fuel pressure sensor (1).
Allow any fuel to drain from the fuel rail and pressure sensor location.
Dry the sealing cone in the fuel rail and the area around the sensor joint with a lint free cloth.
Inspect the sealing cone in the fuel rail. The surface should be free of fuel, debris, and burrs.