Express 2500 V8-6.6L DSL Turbo (2010)
Fuel Pressure Regulator: Service and Repair
VIN 6
Fuel Pressure Regulator Replacement
Removal Procedure
1. Remove the center intake manifold. Refer to Center Intake Manifold Replacement (LMM) (See: Engine, Cooling and Exhaust/Engine/Intake
Manifold/Service and Repair/Center Intake Manifold Replacement).
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. 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(R).
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:
