Fleece SureFlo Performance Sending Unit for 2001-2004 Chevy/GMC LB7 Duramax

A frame mounted lift pump on an LB7 needs a clean pickup in the tank. SureFlo gives it one without drilling.

SureFlo is built to work with aftermarket lift pumps and fits right where your stock sending unit sits. Sumps and draw straws both have real drawbacks, mainly the 1/4 tank issue where the pump cavitates and pulls air into the fuel system. SureFlo solves that at the source.

It's also a smart option for trucks that came without an in-tank pump and need a working level sender, or for anyone who wants to run custom fuel lines straight to the tank.

What SureFlo does

• Drops into the stock sending unit location with no tank cutting or drilling
• Factory style quick disconnects adapt your stock fuel lines at the tank for a clean install
• Draws fuel from and returns fuel to the bucket assembly at the base of the unit, so your pump pulls fuel instead of air and the 1/4 tank problem goes away
• One way check valves in the bucket let fuel flow in easily at lower levels
• New fuel level electronics and fuel float
• Heavy duty billet aluminum cap
• Universal -8 AN ports for professionally plumbing a custom fuel setup
• New O-ring or flange seal

Note: For use on pickup style trucks only. For cab and chassis, verify your pump P/N against Fleece's cross-reference table.

Specs

• Type: SureFlo performance sending unit (not a lift pump)
• Engine: 6.6L LB7 Duramax
• Replaces: 2001-2004 AC Delco 89060639 (GM OE)
• Part number: FPE-SF-GM-0104

Tuning with PPEI

PPEI recommends a solid fuel supply on any LB7 with PPEI engine tuning, and we run Fleece fuel parts on our own trucks. Pair SureFlo with a good aftermarket lift pump and the tune gets steady fuel all the way to empty. Power and throttle response stay strong instead of falling off at a low tank.

Fitment

• Chevrolet Silverado 2500 HD: 2001-2004 Base, LS, LT; 2004 WT
• Chevrolet Silverado 3500: 2001-2004 Base, LS, LT; 2004 WT
• GMC Sierra 2500 HD: 2002-2004 Base; 2001-2002 SL; 2001-2004 SLE, SLT; 2003-2004 WT
• GMC Sierra 3500: 2002-2004 Base; 2001-2002 SL; 2001-2004 SLE, SLT; 2004 WT