2001–2004 LB7 Duramax Reman CP3 Injection Pump | Dynomite Diesel CP3-303

A failing CP3 can leave your LB7 Duramax struggling to start, losing rail pressure, smoking, or running poorly. The Dynomite Diesel CP3-303 is a remanufactured stock-output high-pressure injection pump built as a direct replacement for 2001–2004 6.6L LB7 engines. It restores factory fuel volume and rail pressure so your truck can start, idle, and pull like it should.

This is a stock-spec reman pump—not a stroker or performance upgrade. It is designed to match original fuel delivery and drop in as a straightforward replacement on 2001–2004 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD trucks with the 6.6L LB7 Duramax.

Highlights

• Remanufactured stock CP3 for OEM-level fuel delivery
• Direct-fit replacement for 2001–2004 LB7 Duramax
• Restores high-pressure fuel supply, rail pressure, and drivability
• Built to meet original-equipment performance standards
• Ready to install with no modifications required

Fitment

• 2001–2004 Chevrolet Silverado 2500HD / 3500HD
• 2001–2004 GMC Sierra 2500HD / 3500HD
• 6.6L Duramax LB7 diesel

Choose the CP3-303 when you want a quality remanufactured replacement that brings the fuel system back to factory operation without changing the truck’s stock fueling characteristics.