What is a CP3 Pump and How Does It Work in Your Truck?

If you've spent any time hanging out in diesel forums or chatting with mechanics, you've probably heard people asking what is a cp3 pump and why everyone seems to want one under their hood. It's one of those parts that doesn't get much glory until it stops working or you're looking to make some serious power. To put it simply, if your diesel engine is the heart of your truck, the CP3 pump is the high-pressure artery that keeps the whole system alive. ...

February 16, 2026 · 6 min · Barrenechea Pinkwater