17-25 GM 6.6L L5P/L5D Duramax Industrial Injection HP4 High Pressure Fuel Injection Pump

Fits: 2017-2025 GM 6.6L L5P/L5D Duramax

This is a high-pressure common rail fuel injection pump (HP4) designed for diesel engines, specifically the GM Duramax 6.6 L L5P/L5D found in heavy-duty trucks. It is the component that pressurizes diesel fuel to the very high pressures required by the engine’s common rail fuel injection system. This pump is a direct replacement for the original equipment unit and doesn’t require modifications when installed.

In a common rail diesel system, the high-pressure fuel pump plays a central role by generating extremely high fuel pressures (often thousands of psi) to ensure the injectors can atomize fuel correctly. Failure or wear in this pump often leads to:

• Loss of power

• Hard starting or non-starting

• Misfires or rough idle

• Diagnostic trouble codes related to fuel pressure

Replacing a worn or failed HP4 pump with a quality unit like this restores proper fuel delivery and engine performance.

Industrial Injection:294050-0701