2001-2005 Duramax Twin CP3 Controller

High-horsepower 2001–2005 Duramax builds often outrun a single CP3’s volume — rail pressure sags, delivery gets choppy, and the stock gear-driven pump works harder than it should. Wehrli’s Twin CP3 Controller gives the microprocessor control, harness, and connectors needed to run a second belt-driven CP3 alongside the factory pump so you keep stable rail pressure and share the drive load.

This kit (WCF100093): Controller + wire harness + connectors for 2001–2005 Chevrolet/GMC 6.6L Duramax (LB7/LLY). Pair with a compatible second CP3 and supporting fuel hardware; this SKU is the controller/harness package, not a complete twin-pump kit.

Fitment gates:

• 2006–2016 Duramax (LBZ/LMM/LML) → use WCF100094
• Confirm second-pump mount, drive, and fuel-line plan before ordering
• Idaho Falls install available when bay time allows — bring year/engine and current fuel setup

Shipping: This product cannot ship to California (same restriction as WCFab). Free ground on most orders over $150 excludes HI/AK — confirm at checkout.

Call 208-542-7793 with year, make, model, and your twin-CP3 plan before you order.

Emissions-compliant performance only — Powertech Diesel does not sell deletes or defeat devices.