GM 51-68-0003 Supply Pump Module 6.6L

( Brand: Gm ), ( Part Type: Supply Pump Module ), ( Manufacturer Part Number: 51-68-0003 )

Review GM Genuine Def Supply Pump Module 6.6l

The GM 51-68-0003 Def Supply Pump Module is a crucial component in the cooling system of 6.6L Duramax diesel engines. This pump module is responsible for supplying diesel fuel to the engine's injection system at the required pressure and volume.

This pump module is engineered with a robust design to ensure reliable operation under heavy-duty conditions. It features a high-pressure fuel pump, a low-pressure fuel pump, and an integrated fuel pressure regulator. The high-pressure pump delivers fuel at up to 29,000 psi to the injection system, while the low-pressure pump supplies fuel at up to 5,000 psi to the fuel system's various components.

The GM 51-68-0003 Def Supply Pump Module is constructed with durable materials, including a cast aluminum housing and hardened steel pump components. The pump's seals and gaskets are made of high-quality materials to ensure a tight seal and prevent leaks.

The pump module also includes a number of advanced features to improve performance and durability. For example, it features a thermal bypass valve that allows cool fuel to bypass the pump during engine start-up, reducing the load on the pump and preventing damage from overheating. It also includes a fuel filter to remove contaminants from the fuel supply.

Installation of the GM 51-68-0003 Def Supply Pump Module is straightforward and can be done by a qualified technician or an experienced do-it-yourselfer. The pump module comes with all necessary hardware for installation, and the installation process is well-documented in the service manual for the 6.6L Duramax engine.

In summary, the GM 51-68-0003 Def Supply Pump Module is a high-performance and durable component that plays a critical role in the cooling system of 6.6L Duramax diesel engines. It is engineered with a robust design, advanced features, and high-quality materials to ensure reliable operation under heavy-duty conditions. Whether you are a professional technician or a do-it-yourselfer, installing this pump module is a smart investment in the longevity and performance of your diesel engine.

The GM 51-68-0003 Defueling Supply Pump Module is a crucial component in the fuel system of 6.6L GM engines. Replacing a faulty or failing pump module can prevent potential fuel delivery issues, improving vehicle performance and ensuring safe operation. Here are some pros and cons to consider before making a purchase.

1. Enhanced Fuel Efficiency: A new Defueling Supply Pump Module can help improve fuel efficiency by ensuring optimal fuel delivery to the engine.

2. Improved Engine Performance: Proper fuel delivery is essential for optimal engine performance. A new pump module can help restore lost power and improve overall engine response.

3. Reduced Emissions: A malfunctioning fuel pump can cause increased fuel consumption and higher emissions. Replacing the faulty module with a new one can help reduce emissions.

4. Safety: A failing fuel pump can lead to fuel leaks, fires, or stalling, which can be dangerous. A new pump module ensures a safe and reliable fuel delivery system.

5. Peace of Mind: Investing in a new Defueling Supply Pump Module can provide peace of mind, knowing that the fuel system is functioning correctly and that potential issues have been addressed.

1. Cost: Replacing a fuel pump module can be expensive, especially for a GM 6.6L engine. The cost of the part itself, as well as labor and installation, can add up.

2. Installation Complexity: The fuel pump module is located within the tank, which can make installation more complicated and time-consuming.

3. Potential for Hidden Issues: If the fuel pump module is failing, there may be underlying issues within the fuel system that could require additional repairs.

The decision to buy a new GM 51-68-0003 Defueling Supply Pump Module for a 6.6L engine depends on various factors, including the vehicle's condition, driving habits, and personal budget. If the fuel pump is causing noticeable performance issues, stalling, or safety concerns, investing in a new module is recommended. However, if the vehicle is in good condition and the fuel pump is functioning adequately, it may be more cost-effective to continue monitoring its performance and address any issues as they arise. Ultimately, the choice is yours, and it's essential to weigh the pros and cons carefully before making a decision.

If you're experiencing fuel delivery issues, stalling, or safety concerns with your GM 6.6L engine, it's recommended to consider purchasing a new Defueling Supply Pump Module. Ensure you're buying the correct part from a trusted supplier and consider having it installed by a professional mechanic to ensure proper installation and optimal performance. If your vehicle is in good condition and the fuel pump is functioning adequately, it may be more cost-effective to continue monitoring its performance and address any issues as they arise. Regular maintenance and inspections can help prevent potential problems and ensure the longevity of your fuel system.

Details:

Strange noises from the pump. Engine or DEF fault codes. Maintain correct pressure and flow. Dashboard may show DEF System Fault, Check SCR System, or low warnings, even if the tank is full.

Vehicles often limit engine power or speed when the SCR system detects a DEF delivery problem. Mounting Hardware Included. Monitor the DEF system. DEF reacts with nitrogen oxides Nix in the SCR system to produce harmless and water vapor.

Deliver DEF to the SCR system. Outlet Port Quantity. Inlet Port Quantity. A failing pump can make grinding, buzzing, or whirring noises, indicating mechanical failure.

Reduced engine power aerate. DEF freezing issues. The module pumps DEF from the tank to Selective Catalytic Reduction SCR injector in exhaust. Flow/ pressure.

A DEF Supply Pump Module 51-68-0003 is a key component of diesel vehicles emissions system that pumps Diesel Exhaust Fluid DEF from the tank to exhaust system, ensuring vehicle can reduce harmful. If you refill the tank but DEF gauge doesn change or fluid seem to move, pump may not be working. Without the pump, DEF cannot reach SCR system, and emissions control process occur. Some modules have heating elements.

Many DEF supply pump modules have sensors that measure. DEF or SCR warning lights. End 1 Terminal Type. DEF not being consumed.

Sometimes the check engine light also comes on. If these fail, DEF may freeze in cold temperatures, causing system errors. These signals are sent to the engine control module ECU alert driver of issues or adjust DEF dosing automatically. Scan tools may show codes like.

The module regulates fluid pressure and flow rate so the SCR system works efficiently prevents over or under injection. End 2 Terminal Type. Part Number: 51-68-0003, condition: New, Manufacture/Brand: GM, Specifications 51-68-0003: Housing Material. The pump ensures the right amount of DEF is delivered at time, which essential for emissions reduction.

This is a protective measure to prevent excessive emissions.

part #: 51680003 prices

• $442.64-$693.55

specifications pumpunite:

• brand: Gm
• part type: Supply Pump Module
• manufacturer part number: 51-68-0003

shipping pumpunite:

• carrier: UPS
• cost: $0.00
• transit: 5-10 Days
• service: UPS Ground, UPS Next Day Air Saver, UPS Next Day Air
• class: Standard, One-day
• type: Calculated

returns pumpunite:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

payments pumpunite:

• wallet: Google-pay
• credit card: Diners-club
• other

offer pumpunite:

• quantity: 1
• sold: 0
• started: March 18, 2026
• availability: In Stock
• options: Ship-to-home
• best offers: True

seller pumpunite:

• city: Lyman, South Carolina
• # reviews: 542
• rating: 99.8%

general pumpunite:

• condition: New
• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Pumps Sending Units

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