LB7 Duramax SureFlo Performance Fuel Sending Unit – Fleece FPE-SF-GM-0104

Upgrade your 2001–2004 LB7 Duramax fuel system with the Fleece SureFlo Performance Fuel Sending Unit (FPE-SF-GM-0104). This direct-fit replacement eliminates the common problems that come with running an external aftermarket lift pump—no more tank drilling, no sump, and no more ¼-tank air ingestion or pump cavitation.

The SureFlo draws fuel from (and returns fuel to) a dedicated bucket assembly at the bottom of the unit. One-way check valves keep fuel available even at low levels, ensuring your lift pump always pulls clean, air-free fuel. The result is consistent fuel supply, better reliability, and the ability to run your truck confidently down to lower fuel levels.

Key Features

• OEM-style fitment – drops straight into the factory sending unit location with no tank cutting or drilling
• Heavy-duty billet aluminum cap
• New fuel level electronics and float for accurate gauge readings
• Universal -8 AN ports for clean, professional custom plumbing
• Factory-style quick-disconnect fittings that work with stock fuel lines
• Includes new flange seal
• 1-year limited parts warranty

Fitment

2001–2004 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD equipped with the 6.6L LB7 Duramax diesel.

Note: Will not fit S&B tanks. Designed for pickup trucks (verify cab & chassis applications).

Whether you’re installing a new external lift pump, repairing a failed stock sender, or building a custom fuel system, the Fleece SureFlo is the cleanest, most reliable solution available for the LB7.