GBR 522-030 Fuel Injection Return Line Gasket Kit

Fuel Injector Return Line Gasket Kit for Duramax LB7

Restore a proper seal at the injector fuel return rail manifold with this GBR Fuel Injector Return Line Gasket Kit, part number 522-030. It is built for Duramax LB7 applications and supports clean, leak-free service on the fuel return side of the injection system.

Compatible with Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, GMC Sierra 2500 HD, and GMC Sierra 3500 diesel applications from 2001-2005.

• Brand: GBR Fuel Injector Return Line Gasket Kit
• Part number: 522-030
• Paraphrased OE-style service kit for injector fuel return rail manifold resealing
• Fits Duramax LB7 engine applications
• Cross-reference part numbers: 97251046, 97600925

Application Details

This fuel injection return line gasket kit is made for service work on the injector return rail manifold. It addresses the sealing points used on the Duramax LB7 fuel return system and is a direct-fit service part for the listed Chevrolet and GMC heavy-duty trucks. If you are searching for a 2001-2005 Chevrolet Silverado 2500 HD fuel injector return line gasket kit or a 2001-2004 GMC Sierra 3500 injector return rail seal kit, this part number 522-030 matches those applications.

Common Issues Addressed

• Fuel seepage at the injector return rail manifold
• Hard starting caused by air intrusion at return line seals
• Visible diesel fuel residue around injector return connections
• Service replacement after injector return line maintenance
• Leak repair on Duramax LB7 fuel return sealing points

Installation Notes

Clean the sealing surfaces before installation and inspect the injector return rail manifold for wear, damage, or contamination. Follow factory service procedures for the Duramax LB7 fuel system, and verify all connections are seated correctly before returning the vehicle to service. Part number 522-030 is commonly searched as a Chevrolet Silverado 2500 HD fuel injector return line gasket kit and a GMC Sierra 2500 HD return rail gasket kit.

Quality Assurance

GBR supplies service parts for fuel system repair applications, and this kit is intended to support proper resealing of the injector fuel return rail manifold on listed Duramax LB7 trucks. Part number 522-030 cross-references OE numbers 97251046 and 97600925 for the same application.