2025 L5P CCV Upgrade system – keep your Turbo and intake air system clean!
What is a CCV system ?
CCV stands for “Crankcase Ventilation” On all diesels and especially the L5P the CCV is connected to a valve cover to extract the combustion gasses that have entered the crankcase via bypassing the piston rings, and other gasses as the result of oil aeration. The CCV system connects to the factory intake or intake manifold, in the case of diesels – the intake air horn. The factory intake air horn draws a vacuum across the CCV system by way of BERNOULLIS PRINCIPAL to pull crankcase gases out of the engine and reburn them in the motor. The problem is often as a diesel wears out they endup with a lot of blow by and oil injection into the inlet of the turbo. The truck consumes this oil as part of emissions standards and best practices of crank case evacuation.
What is this ?
This is an upgrade to the existing L5P CCV system that is failure prone due to cracking of the factory plastic over time. It also stops the high temperature charge air temp from the turbo from being drove through the factory CCV system and into the intake air horn into the turbo inlet.
The 2025 + GM L5P is the first generation of HD diesel to run a Crank Case pressure sensor sensor. The OEM CCV system deposits oil directly into the inlet of the pressure sensor. Over time this blocks the pressure sensor passageway and results in a P04DB and limp condition. Our CCV upgrade kit removes the sensor from this direct oil spray allowing it to stay clear and ready to detect pressure changes in the crank case and keep the truck from derate conditions.
The CCV upgrade system once installed will allow more oil to be removed from the CCV supply line by usage of 2 differential drop devices that are integrated into the CCV block. This highly effective method, used for years in marine applications and other high output diesel applications is passive (no moving parts) and will keep the intake track of your L5P as clean as possible and avoid hot air combined with oil from entering the system.
Why did we make this?
3 Reasons
Installation
The factory has 4 safety lock screws attaching the factory CCV to the engine. Installation time is 30-45 min.
Important
The CCV system on the 2025+ Gen2 Duramax can NOT be routed to the atmosphere. Doing so will result in an immediate P04DB code and limp mode condition.
** Warranty Disclaimer VIN Specific Enterprises LLC, backs this product for the life against workmanship and manufacturing practices. Poor installation practice or harm caused by this product or misuse are responsibility of the customer and end user– not VIN Specific Enterprises LLC. If there are questions regarding installation, or warranty call 1-833-789-7700 ext 2 !!
