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Fuel Sending Unit
For 2011-2016 Chevy/GMC Trucks With 6.6L Duramax LML Diesel Engine
Fuel Tank Sending Units for Chevrolet Silverado & GMC Sierra 2500HD/3500HD With 6.6L Duramax LML
Fuel tank sending units are an essential part of the fuel system on 2011-2016 GM Heavy-Duty trucks equipped with the 6.6L Duramax LML engine. Mounted inside the fuel tank, the sending unit assembly manages fuel pickup and return routing while also supplying the signal used for the fuel level gauge. On the LML Duramax, this component plays a critical role in maintaining consistent fuel delivery and accurate fuel level readings. Unlike some diesel platforms, the LML Duramax does not use a factory in-tank lift pump. Instead, the sending unit functions as a fuel pickup and return point along with the fuel level sender. As mileage accumulates or fuel system modifications are made, limitations or wear within the factory sending unit can become more noticeable.
Tech Tips to Know Before You Buy
- Performance-Style Sending Units: These sending units are commonly used when an external fuel pump system is added. They are designed to support higher fuel flow demands and provide improved supply and return connections compared to the factory configuration.
- OE-Style Replacement Sending Units: Designed to restore factory operation, these units replace worn or failing components and help correct inaccurate fuel gauge readings while maintaining stock fuel system layout.
Why Replace the Fuel Tank Sending Unit?
- Inaccurate Fuel Gauge Readings: Internal wear to the level sender or float assembly can result in erratic or incorrect fuel level readings, especially on higher-mileage trucks.
- Fuel Supply Concerns: As fuel demand increases or additional fuel system components are added, the factory sending unit may become a restriction, making an upgraded design beneficial.
- Fuel System Modifications: Replacing the sending unit during fuel system upgrades can simplify installation and help ensure proper fuel pickup and return flow without modifying factory tank components.
Shop Fuel Sending Units for Your GM 6.6L Duramax LML
Select the correct fuel tank sending unit to restore proper fuel system function or support fuel system upgrades on your diesel truck. Fuel tank sending units are available for 2011, 2012, 2013, 2014, 2015, and 2016 Chevrolet Silverado and GMC Sierra 2500HD/3500HD models equipped with the 6.6L Duramax LML diesel engine.