GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2008 🢒 H2 🢒 Engine 🢒 Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Fuel Pressure Sensor Replacement

Removal Procedure

    Object Number: 1855445 Size: SH
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .

    2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

  2. Disconnect the chassis wiring harness electrical connector (1) from the fuel pressure sensor.

    3. Object Number: 1855447 Size: SH
  3. Wrap a shop towel around the fuel pressure sensor fitting in order to absorb any fuel that may leak out.
  4. Remove the fuel pressure sensor from the fuel line.
  5. Remove and discard the fuel pressure sensor O-ring seal.

Installation Procedure

    Object Number: 1855447 Size: SH
  1. Lubricate a NEW fuel pressure sensor O-ring seal with clean engine oil.
  2. Install the NEW fuel pressure sensor O-ring seal onto the fuel line fitting.
  3. Wrap a shop towel around the fuel pressure sensor fitting in order to absorb any fuel that may leak out.

    4. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the fuel pressure sensor to the fuel line.

    5. Tighten
    Tighten the sensor to 15 N·m (11 lb ft).


    Object Number: 1855445 Size: SH
  5. Connect the chassis wiring harness electrical connector (1) to the fuel pressure sensor.
  6. Use the following procedure in order to inspect for leaks:
    7. 6.1. Turn the ignition ON, with the engine OFF, for 2 seconds.
    6.2. Turn the ignition OFF for 10 seconds.
    6.3. Turn the ignition ON, with the engine OFF.
    6.4. Inspect for fuel leaks.