GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Controls - 6.6L (LLY) 🢒 Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement

Removal Procedure

    Object Number: 1335543 Size: SH
  1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  2. Remove the exhaust gas recirculation (EGR) cooler tube. Refer to Exhaust Gas Recirculation Valve Cooler Replacement .
  3. Disconnect the fuel rail pressure sensor electrical connector.

    4. Object Number: 1379579 Size: SH
  4. Prior to removal, clean the fuel pressure sensor and surrounding area thoroughly with solvent, such as GM P/N 12377981 (Canadian P/N 10953463) or equivalent.
  5. Using compressed air, thoroughly blow dry the sensor and surrounding area.
  6. Remove the fuel pressure sensor (1).

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1379579 Size: SH
  1. Install the fuel pressure sensor (1).

    2. Tighten
    Tighten the sensor to 70 N·m (52 lb ft).


    Object Number: 1335543 Size: SH
  2. Connect the fuel rail pressure sensor electrical connector.
  3. Install the EGR cooler tube. Refer to Exhaust Gas Recirculation Valve Cooler Replacement .
  4. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  5. Prime the fuel system. Refer to Fuel System Priming .
  6. Start the engine. If the engine stalls, repeat the above step.
  7. Once the engine starts, inspect for fuel leaks.