Exergy E04 10504 Improved Stock CP4.2 Fuel Pump for 11-16 Duramax LML 6.6L

Vehicle Fitment

• 2011-2016 Chevrolet Silverado 2500 HD (6.6L LML Duramax, VIN 8)
• 2011-2016 Chevrolet Silverado 3500 HD (6.6L LML Duramax, VIN 8)
• 2011-2016 GMC Sierra 2500 HD (6.6L LML Duramax, VIN 8)
• 2011-2016 GMC Sierra 3500 HD (6.6L LML Duramax, VIN 8)
• 2011-2016 Chevrolet Express 2500 (6.6L LML Duramax, VIN 8)
• 2011-2016 Chevrolet Express 3500 (6.6L LML Duramax, VIN 8)
• 2011-2016 GMC Savana 2500 (6.6L LML Duramax, VIN 8)
• 2011-2016 GMC Savana 3500 (6.6L LML Duramax, VIN 8)

Features

• Direct replacement for factory CP4.2 pump - no plumbing or tuning modifications required
• Includes System Saver Inlet Metering Valve with dual-layer 10-micron stainless steel screen (8x finer than OEM 85-micron screen)
• Increased roller diameter reduces wear at pump cam for extended service life
• Anti-rotation pinned buckets prevent internal component movement
• Less susceptible to fuel contamination compared to factory CP4.2 design
• Supports stock to 550+ HP applications without additional modifications
• No core charge or core return required
• Addresses common CP4 platform failures for improved reliability

Specifications

• Pump Type: CP4.2 High-Pressure Fuel Injection Pump
• Pressure Rating: Up to 30,000 PSI (2,000 bar)
• Inlet Screen: Dual-layer 10-micron stainless steel frame (replaces OEM 85-micron plastic)
• Power Rating: Stock to 550+ HP
• Recommended Fuel Supply: 150 GPH at 8-10 PSI per pump for maximum performance
• Weight: 18-20 lbs
• VIN Code: 8th digit must be "8" for LML engine
• Warranty: 1 year to original purchaser

Included Components

• 1x Exergy Improved Stock CP4.2 Pump
• 1x Pre-Installed System Saver Inlet Metering Valve with 10-micron screen
• 1x Upgraded heavy-duty FPRV screen

Product Description

The Exergy E04 10504 Improved Stock CP4.2 Pump is engineered to address the reliability issues plaguing factory CP4.2 pumps in 2011-2016 LML Duramax engines. This direct-fit replacement eliminates the need for costly CP3 conversions while providing enhanced protection against contamination and premature wear. The pump features an upgraded System Saver Inlet Metering Valve with a dual-layer, 10-micron stainless steel screen that provides over eight times finer filtration than the factory 85-micron plastic-framed screen, significantly reducing the risk of debris-related pump failure.

Designed for applications from stock to 550+ horsepower, this improved CP4.2 pump requires no tuning or supporting modifications for installation. The pump utilizes increased roller diameter technology to reduce wear at the pump cam, along with anti-rotation pinned buckets that prevent internal component movement under high-stress conditions. These engineering improvements ensure reliable fuel delivery at pressures up to 30,000 PSI while maintaining compatibility with B20 biodiesel fuel.

This pump serves as a direct replacement for Bosch part numbers 0 445 010 616, 0 986 437 421, and 0 445 010 817, as well as GM part numbers 98077841, 12645102, 12638262, 12658095, and 12661059. Installation requires no plumbing changes and is backed by a 1-year warranty. While a lift pump is not required, Exergy recommends a fuel supply of 150 GPH at 8-10 PSI for optimal performance. Best of all, there is no core charge or core return required, making this upgrade hassle-free for truck and van owners looking to restore or enhance their LML Duramax fuel system reliability.