S&B 86-3000 Fuel Sending Unit for Aftermarket Lift Pumps | 2005-2009 Ram 5.9L/6.7L Cummins

Features:

• Fixes low fuel issues at 1/4 tank
• Allows full use of tank capacity
• Compatible with external lift pumps
• Venturi jet pump keeps reservoir full
• Prevents air from reaching fuel lines
• No check engine lights from low fuel
• Completely plug-and-play installation
• No need to modify OEM tank
• Reliable fuel delivery at low levels
• Built for aftermarket fuel systems
• Supports 5.9L and 6.7L engines

Fuel Sending Unit for Aftermarket Lift Pumps

If you’ve ever watched your fuel gauge drop below a quarter tank and felt the anxiety creep in—especially with an aftermarket lift pump under the hood—you’re not alone. That frustrating moment when your truck suddenly acts fuel-starved well before empty is exactly what the S&B Fuel Sending Unit is built to solve. Designed specifically for 2005–2009 Ram 5.9L and 6.7L Cummins trucks, this upgrade keeps your lift pump fed all the way down to the last drop in the tank—no more babying the fuel level or guessing when it’s “safe” to fill up. At the heart of this setup is a Venturi jet pump system, powered by your existing aftermarket external lift pump. What makes it special is how it actively draws fuel from the tank and keeps a dedicated reservoir full, even when you're running low. That means consistent fuel supply to the engine, no interruptions in performance, and no annoying check engine lights triggered by low-pressure warnings. It’s a game-changer for anyone running a high-performance fuel system who still wants to use their full tank range.

Simple Install

Installation is a breeze, too. The unit is fully plug-and-play, so there's no need to cut, splice, or modify your OEM tank or sending unit. Whether you’re running a FASS, AirDog, or another external lift pump, this drop-in solution was engineered to work with your setup. The build quality is solid, just like you'd expect from S&B—reliable, well-designed, and built with real-world use in mind. Behind the wheel, you’ll notice peace of mind more than anything. You’re no longer tied to refueling early, and you won’t be second-guessing every long haul or trail run when the gauge drops.

Fits: 2005, 2006, 2007, 2008, 2009 Dodge Ram 5.9L / 6.7L Cummins

Install Instructions