01-04 GM 2500/3500 LB7 DURAMAX SUREFLO PERFORMANCE SENDING UNIT

SureFlo Performance Sending Unit | 2001–2004 Duramax LB7

Upgrade your fuel delivery from the tank up with the Fleece Performance SureFlo Performance Sending Unit for the 2001–2004 GM 2500/3500 LB7 Duramax. Designed to replace the factory sending unit with a high-flow, performance-oriented assembly, the SureFlo ensures your fuel system can keep up with the demands of a modified or high-performance LB7 — eliminating fuel starvation and keeping your CP3 fed under hard acceleration and heavy load.

Why Upgrade to the SureFlo?

The factory LB7 sending unit was designed for stock fuel demands. As soon as you add performance tuning, upgraded injectors, or a larger CP3, the OEM unit becomes a bottleneck. Fuel starvation under load causes lean conditions, injector damage, and inconsistent power delivery. The SureFlo eliminates that restriction with a high-flow design built for performance applications.

Features

• High-flow performance sending unit — replaces the factory assembly
• Eliminates fuel starvation under hard acceleration and heavy towing
• Supports upgraded injectors, CP3 pumps, and performance tunes
• Direct fit for 2001–2004 GM 2500/3500 LB7 Duramax
• Built by Fleece Performance — a leader in Duramax fuel system upgrades

Fitment

• 2001–2004 GM Silverado/Sierra 2500/3500 6.6L Duramax LB7

If you're building a performance LB7, the SureFlo sending unit is the foundation your fuel system needs to deliver consistent power from tank to injector.