Electric Fuel Pump For 2004-2008 Chevrolet Silverado 2500 HD/2500 HD Classic/3500 Classic/3500 HD,V8 6.6L

Hard starting, loss of fuel prime, air entering the supply side, restricted fuel delivery, an inaccurate fuel gauge, or a damaged in-tank pickup and reservoir assembly can require service inside the tank. The BDFHYK E4073R is an in-tank diesel fuel reservoir and sender module for the specific 2004–2008 Chevrolet Silverado and GMC Sierra 2500/3500 6.6L diesel applications listed below. Confirm the exact model, year, Classic or new-body configuration, 6.6L diesel engine, cab/chassis arrangement, tank position and capacity, flange, lines, sender layout, and OE reference against the removed assembly.

E4073R Diesel Fuel Reservoir and Sender for GM HD Trucks

Detailed Chevrolet Applications

• 2004–2008 Chevrolet Silverado 2500 HD with the 6.6L diesel engine; verify 2008 first-design configuration where specified
• 2007 Chevrolet Silverado 2500 HD Classic with the 6.6L diesel engine
• 2004–2006 Chevrolet Silverado 3500 with the 6.6L diesel engine
• 2007 Chevrolet Silverado 3500 Classic with the 6.6L diesel engine
• 2007–2008 Chevrolet Silverado 3500 HD with the 6.6L diesel engine; verify cab/chassis and tank configuration

Detailed GMC Applications

• 2004–2008 GMC Sierra 2500 HD with the 6.6L diesel engine; verify 2008 first-design configuration where specified
• 2007 GMC Sierra 2500 HD Classic with the 6.6L diesel engine
• 2004–2006 GMC Sierra 3500 with the 6.6L diesel engine
• 2007 GMC Sierra 3500 Classic with the 6.6L diesel engine
• 2007–2008 GMC Sierra 3500 HD with the 6.6L diesel engine; verify cab/chassis and tank configuration

This assembly is part of the low-pressure tank pickup, reservoir, and sender system. It is not the engine-mounted high-pressure injection pump. Tank design, body generation, and OE number must match.

Confirm Tank, First-Design, and Sender Configuration

Compare the removed assembly with the product images. Check the locking flange, line connections, reservoir and pickup shape, module depth, strainer, float arm, electrical connector, sender resistance configuration, and installed tank. Some 2008 catalog entries identify a first-design module, making the production and physical-module check essential.

E4073R OE and Interchange References

Common references include E4073R, 19133489, 19150402, 19152169, 19206540, 19303408, 19303427, 19303428, 19331309, 25350791, FG0358, SP6358M, P74700R, and MU1228. GM 19331309 supersedes several earlier references, but the original tank and module configuration must still be verified.

Duramax Low-Pressure Fuel-System Diagnosis

• Inspect the fuel filter, filter head, hand primer, seals, and water-in-fuel components.
• Check supply and return lines for restriction, leaks, collapsed sections, or air intrusion.
• Verify the tank pickup, reservoir, strainer, sender circuit, connector, and ground.
• Confirm that the tank contains clean diesel fuel without water, sediment, or microbial contamination.
• Check the fuel-level circuit separately when the gauge is inaccurate.
• Follow the correct 6.6L diesel diagnostic procedure before condemning the in-tank assembly.

Hard starting or loss of prime can also result from a leaking filter head, injector return leakage, restricted lines, damaged seals, or high-pressure injection-system faults. Replacing the tank module will not correct those conditions.

GM 6.6L Diesel Module Installation Notes

1. Disconnect the batteries and follow the diesel fuel-system depressurizing procedure.
2. Clean the tank opening and surrounding area before removal.
3. Record the tank position, flange, connector, line, pickup, strainer, and float-arm orientation.
4. Drain contaminated diesel fuel and clean the tank as required.
5. Inspect supply and return lines, the filter head, and electrical connector.
6. Install a new seal and fully secure the retaining ring.
7. Reconnect the lines and electrical connector without forcing the fittings.
8. Prime and bleed the low-pressure diesel supply according to the service procedure.
9. Inspect for leaks, verify stable starting, and confirm correct fuel-gauge operation.

Do not apply gasoline-module assumptions to this 6.6L diesel system. Verify the exact truck configuration and complete the required priming procedure before starting the engine.