S&S Diesel CP3 Conversion Kit for 2011–2016 6.6L LML Duramax

S&S CP3 Conversion Kit for 2011–2016 LML Duramax

Replace the factory CP4 high-pressure fuel pump on your 2011–2016 GM 6.6L LML Duramax with S&S Diesel Motorsport's CARB-compliant CP3 conversion kit.

Designed as a complete conversion for the LML platform, this system replaces the factory CP4 with S&S's CP3-based fuel pump setup while retaining factory-style operation without requiring tuning.

Features

• Converts the factory CP4 high-pressure fuel pump to a CP3
• S&S-modified Bosch CP3 pump
• No tuning required
• Designed to maintain factory fuel-system operation
• Complete conversion components for installation
• Engineered specifically for the LML Duramax platform
• CARB compliant — EO #D-756-4

Fitment

2011–2016 Chevrolet Silverado 2500HD/3500HD | 6.6L LML Duramax
2011–2016 GMC Sierra 2500HD/3500HD | 6.6L LML Duramax

Why Convert to a CP3?

The factory LML Duramax uses a Bosch CP4 high-pressure fuel pump. The S&S conversion replaces the CP4 with a CP3-based system while retaining the truck's factory-style fuel-system operation.

For LML owners focused on fuel-system reliability, this kit provides a purpose-built CP3 conversion without requiring additional tuning.