GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 Savana - AWD 🢒 Engine 🢒 Engine Controls - 6.6L 🢒 Fuel Pressure Regulator Replacement

Removal Procedure

    Object Number: 786996 Size: SH
  1. Remove the air intake pipe. Refer to Air Intake Pipe Replacement .
  2. Remove the exhaust gas recirculation (EGR) cooler tube. Refer to Exhaust Gas Recirculation Valve Cooler Replacement .
  3. Remove the fuel return line from the fuel pipe.
  4. Remove the fuel pipe clamp bolt and reposition the fuel line out of the way.
  5. Disconnect the fuel pressure regulator electrical connector (1).

    6. Object Number: 901300 Size: SH
  6. Clean the fuel pressure regulator and high pressure injection pump thoroughly with solvent, such as GM P/N 12377981 (Canadian P/N 10953463) or equivalent.
  7. Using compressed air, thoroughly blow dry the regulator and pump.
  8. Remove the 3 fuel pressure regulator screws (1) using a T25 TORX®.

    9. Object Number: 901301 Size: SH
  9. Remove the fuel pressure regulator (1).
  10. If dirt or debris is found in the bore or seating surfaces of the fuel injection pump, perform the following:
    11. • Place a clean rag over the bore on order to collect the excess fuel.
    • Bump the engine over in order to flush any debris out of the regulator bore.

Installation Procedure

Important: If the pressure regulator is being re-used, check the O-rings for damage. If the O-rings are damaged, install NEW O-rings.


    Object Number: 901301 Size: SH
  1. Lubricate and install NEW O-rings onto the regulator. Lubricate the O-rings with clean, NEW engine oil.

    2. Important: If the regulator is installed at an angle the O-rings may be damaged, resulting in possible fuel leakage.

  2. Install the fuel pressure regulator (1).

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


    Object Number: 901300 Size: SH
  3. Install the 3 fuel pressure regulator screws (1) using a T25 TORX®.

    4. Tighten

        • Tighten the screws a first pass to 4 N·m (35 lb in).
        • Tighten the screws a final pass to 7 N·m (62 lb in).
  4. Install the distribution block hoses to the distribution block.
  5. Position the distribution block hose clamps.

    6. Object Number: 786996 Size: SH
  6. Connect the fuel pressure regulator electrical connector (1).
  7. Position the fuel pipe and install the clamp bolt.

    8. Tighten
    Tighten the bolt to 25 N·m (18 lb ft).

  8. Install the fuel return line to the fuel pipe.
  9. Install the EGR cooler tube. Refer to Exhaust Gas Recirculation Valve Cooler Replacement .
  10. Install the air intake pipe. Refer to Air Intake Pipe Replacement .
  11. Prime the fuel system. Refer to Fuel System Priming .
  12. Start the engine.

    13. If the engine stalls, repeat the above step.

  13. Once the engine starts, inspect for fuel leaks.