Delphi EX631047 Fuel Injector

Delphi EX631047 Diesel Fuel Injector

The Delphi EX631047 is a remanufactured diesel fuel injector built for light-duty diesel systems that require precise fuel delivery and OE-style fitment. It is a direct replacement option for select Chevrolet, GMC, and Hummer applications, including Silverado 2500 HD, Sierra 3500, and Express van models with the LBZ RPO code.

• Remanufactured standard replacement fuel injector
• Fuel type: diesel
• Light duty diesel injector system type
• Oval female connector with 2 blade terminals
• Metal and plastic body construction
• Gasket/seal included; 1 O-ring included
• Clamp w/bolt attachment method
• Package includes fuel injector and instruction sheet

OE-Style Diesel Injection Performance

Delphi EX631047 is engineered from OE heritage and backed by more than 100 years of supplier experience with major automakers. This remanufactured injector is built for diesel fuel systems that need accurate atomization and consistent delivery, making it a practical replacement for 2006-2007 Chevrolet Express 2500, 2006-2007 GMC Savana 3500, and 2006 Chevrolet Silverado 2500 HD applications, among others. The EX631047 also cross-references Bosch 0986435521 for the same application.

Vehicle Fitment

• Fits 2006-2007 Chevrolet Express 2500, RPO Code LBZ
• Fits 2006-2007 Chevrolet Express 3500, RPO Code LBZ
• Fits 2007 Chevrolet Silverado 2500 HD Classic
• Fits 2007 Chevrolet Silverado 3500 Classic
• Fits 2006-2007 GMC Savana 2500, RPO Code LBZ
• Fits 2006-2007 GMC Savana 3500, RPO Code LBZ
• Fits 2007 GMC Sierra 2500 HD Classic
• Fits 2007 GMC Sierra 3500 Classic
• Fits 2006 Chevrolet Silverado 2500 HD, RPO Code LBZ
• Fits 2006 Chevrolet Silverado 3500, RPO Code LBZ
• Fits 2006 GMC Sierra 2500 HD, RPO Code LBZ
• Fits 2006 GMC Sierra 3500, RPO Code LBZ
• Fits 2006 Hummer H1, RPO Code LBZ

Common Issues This Injector Can Address

• Hard starting caused by poor diesel fuel delivery
• Rough idle from inconsistent injector performance
• Excessive smoke related to improper atomization
• Loss of power under load in LBZ diesel applications
• Fuel trim or combustion imbalance from a worn injector

Installation Notes and Tips

Verify the vehicle’s RPO code and connector style before installation. Inspect the sealing surfaces, replace worn seals as needed, and follow the included instruction sheet for proper clamp and bolt installation. Confirm the injector matches the original part number and application before service on Chevrolet Silverado 2500 HD, GMC Sierra 3500, or Express van diesel models.

Quality Assurance

Delphi builds this remanufactured injector using OE-based knowledge developed through long-term supplier experience with leading automakers. The EX631047 is a standard replacement part intended to restore factory-style diesel injector function in the listed applications.