GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Denali 🢒 Engine 🢒 Engine Controls and Fuel - 6.6L (LMM) 🢒 Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement

Removal Procedure

    Object Number: 1872490 Size: SH
  1. Remove the exhaust gas recirculation (EGR) valve cooler. Refer to Exhaust Gas Recirculation Valve Cooler Replacement .
  2. Remove the right exhaust pipe. Refer to Exhaust Pipe Replacement - Right Side .
  3. Disconnect the engine wiring harness electrical connector (1) from the fuel rail fuel pressure sensor wiring harness extension electrical connector.
  4. Remove the fuel rail fuel pressure sensor wiring harness extension clip (3) from the wiring harness bracket.

    5. Object Number: 1873193 Size: SH
  5. Remove the EGR valve cooler rear bracket bolts and bracket.

    6. Object Number: 1873194 Size: SH
  6. Disconnect the fuel rail fuel pressure sensor wiring harness extension (1) from the fuel rail fuel pressure sensor.
  7. Prior to removal, clean the fuel rail fuel pressure sensor and surrounding area thoroughly with solvent, such as GM P/N 12377981 (Canadian P/N 10953463) or equivalent.
  8. Using compressed air, thoroughly blow dry the sensor and surrounding area.
  9. Remove the fuel rail fuel pressure sensor (2).

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1873194 Size: SH
  1. Install the fuel rail fuel pressure sensor (2).

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

  2. Connect the fuel rail fuel pressure sensor wiring harness extension (1) to the fuel rail fuel pressure sensor.

    3. Object Number: 1873193 Size: SH
  3. Position the EGR valve cooler rear bracket to the cylinder head and install the bolts.

    4. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).


    Object Number: 1872490 Size: SH
  4. Connect the engine wiring harness electrical connector (1) to the fuel rail fuel pressure sensor wiring harness extension electrical connector.
  5. Install the fuel rail fuel pressure sensor wiring harness extension clip (3) to the wiring harness bracket.
  6. Install the right exhaust pipe. Refer to Exhaust Pipe Replacement - Right Side .
  7. Install the EGR valve cooler. Refer to Exhaust Gas Recirculation Valve Cooler Replacement .
  8. Prime the fuel system. Refer to Fuel System Priming .
  9. Start the engine. If the engine stalls, repeat the above step.
  10. Once the engine starts, inspect for fuel leaks.