Wehrli 100093 Twin CP3 Controller | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7/LLY

Features: - Fits 2001–2005 Duramax LB7 and LLY engines - Controls dual CP3 pump fuel systems - Supports high-horsepower fuel requirements - Maintains consistent rail pressure under load - Reduces stress on factory CP3 pump - Enables second belt-driven CP3 operation - Improves fuel system reliability and flow - Microprocessor controlled for accurate performance - Essential for twin CP3 setups Fuel Delivery that Matches the Muscle Under the Hood When you're building serious power in your 2001 to 2005 LB7 or LLY Duramax, one CP3 pump often isn't enough to keep up with the fuel demands. That's where the Wehrli 100093 Twin CP3 Controller steps in. Designed specifically for high-output builds, this controller makes it possible to run a second, belt-driven CP3 alongside your factory gear-driven unit. It’s more than just a wiring harness—it uses precise microprocessor control to ensure both pumps work together in sync, maintaining consistent rail pressure no matter how hard you're pushing the truck. If you’re running large injectors, an aggressive tune, or just demanding more from your setup than stock components were designed to handle, this controller makes sure your fueling system keeps pace. Balanced Load, Improved Reliability, and Seamless Integration Adding a second pump isn’t just about making more power—it’s also about protecting the investment you’ve already made. With this controller, fuel volume increases dramatically without putting all the stress on a single CP3. That means smoother operation at higher RPMs, better throttle response, and a noticeable improvement in drivability under load. It’s an essential upgrade for any twin CP3 setup, and Wehrli builds it with reliability and simplicity in mind. Installation is straightforward, and once installed, it works quietly in the background to keep your high-pressure fuel system operating exactly as it should. Whether you're chasing big horsepower or just want a more robust fueling solution, this controller is a key piece to doing it right. Fits: 2001, 2002, 2003, 2004, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7/LLY