CTS RWD V6-3.6L (2008)
Fuel Pressure Sensor/Switch: Service and Repair
Fuel Pressure Sensor Replacement (LLT)
Removal Procedure
1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief (With CH 48027 - LP1, LY7) (See: Fuel Filter/Fuel Pressure Release/Service and
Repair/Fuel Pressure Relief (With CH 48027) (LY7) VIN 7 W/O Direct Fuel Injection)Fuel Pressure Relief (Without CH 48027 - LP1, LY7) (
See: Fuel Filter/Fuel Pressure Release/Service and Repair/Fuel Pressure Relief (Without CH 48027) VIN 7 W/O Direct Fuel Injection)Fuel
Pressure Relief (With High Pressure Pump - LLT) (See: Fuel Filter/Fuel Pressure Release/Service and Repair/Fuel Pressure Relief (With High
Pressure Pump (LLT) VIN V W/ Direct Fuel Injection) .
2. Remove the cross vehicle brace. Refer to Cross Vehicle Brace Replacement (See: Body and Frame/Frame/Cross-Member/Service and
Repair/Cross Vehicle Brace Replacement) .
3. Remove the intake manifold. Refer to Intake Manifold Replacement (See: Engine, Cooling and Exhaust/Engine/Intake Manifold/Service and
Repair) .
4. Remove the foam insulator from the fuel rails.
5. Disconnect the fuel injector wiring harness electrical connector (1) from the fuel injection fuel rail fuel pressure sensor.
6. Place a clean shop towel under the fuel injection fuel rail pressure sensor to fuel rail location.
Important: Applying force to the plastic housing of the sensor will destroy the sensor. To tighten or loosen, only apply force to the
attached hexagon.
7. Using a 27 mm socket, remove the fuel pressure sensor (1) from the fuel injection fuel rail (2). Discard the fuel pressure sensor.
8. Allow any fuel to drain from the fuel rail and pressure sensor location.
9. Dry the sealing cone in the fuel rail and the area around the sensor joint with a lint free cloth.
10. Inspect the sealing cone in the fuel rail. The surface should be free of fuel, debris, and burrs.
Installation Procedure
Important: Applying force to the plastic housing of the sensor will destroy the sensor. To tighten or loosen, only apply force to the attached
hexagon.
Important: Ensure that the fuel rail threads have been cleaned of any excess fuel, or the NEW fuel injection fuel rail fuel pressure sensor will
NOT seal properly.
1. Lubricate the threads and the sealing cone in the fuel rail with silicon free engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent.
2. Lubricate the threads and sealing cone on the NEW fuel injection fuel rail fuel pressure sensor with silicon free engine oil GM P/N 12345610
(Canadian P/N 993193) or equivalent.
