- Genuine OEM Bosch -
LB7 Duramax Injection Pressure Regulator
2001 - 2004.5
2004 owners, please note - your truck could be an LB7, or an LLY. To verify that you have an LB7, please note that the eighth digit of your VIN should be a '1'.
This part is called by many names including:
Injection Pressure Regulator
Fuel Pressure Regulator
Fuel Control Actuator
The function of the LB7 Duramax fuel pressure regulator for fuel injection is to control the output pressure of the high pressure CP3 fuel pump. When the part fails, the actual fuel pressure will not match the desired fuel pressure as specified by the engine computer. Both pressures can be monitored on a scan tool and compared. The most common symptom as the part begins to fail is varying / unstable idle.
The MPROP is mounted on the back side of the CP3 pump and is attached by (3) T-25 Torx head screws. Two o-rings seal the MPROP to the pump and are included already installed on the new part.
Replaces the following part numbers (and others):
Bosch 0 928 400 535