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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM & FUEL SYSTEM - 6.6L (LMM) - INTRODUCTION (2 OF 2)REPAIR INSTRUCTIONSFUEL PRESSURE REGULATOR REPLACEMENTREMOVAL PROCEDURE
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Removal Procedure

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Removal Procedure
    Fig 1: Fuel Pressure Regulator Electrical Connector
    GM786996Courtesy of GENERAL MOTORS CORP.
  1. Remove the center intake manifold. Refer to Center Intake Manifold Replacement (LMM) .
  2. Disconnect the fuel pressure regulator electrical connector (1).
  3. Reposition the distribution block hose clamps.
  4. Remove the distribution block hoses from the distribution block.
    5. Fig 2: Fuel Pressure Regulator Screws
    GM901300Courtesy of GENERAL MOTORS CORP.
  5. 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.
  6. Using compressed air, thoroughly blow dry the regulator and pump.
  7. Remove the 3 fuel pressure regulator screws (1) using a T25 TORX®.
    8. Fig 3: Fuel Pressure Regulator
    GM901301Courtesy of GENERAL MOTORS CORP.
  8. Remove the fuel pressure regulator (1).
  9. If dirt or debris is found in the bore or seating surfaces of the fuel injection pump, perform the following:
    • 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.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.