Mahle GS33578A Fuel Injector Seal Kit

Fuel Injector Seal Kit for GM 2007-2009 HD Trucks

Mahle GS33578A is a fuel injector seal kit for select Chevrolet and GMC heavy-duty trucks and vans. It is built for direct-fit service on GM applications where injector sealing integrity is critical to fuel system performance.

Key Features

• Fuel injector seal kit for service and repair work
• Fits 2007-2009 Chevrolet Silverado 2500 HD and Silverado 3500 HD
• Fits 2008-2009 Chevrolet Express 2500 and Express 3500
• Fits 2007-2009 GMC Sierra 2500 HD and Sierra 3500 HD
• Fits 2008-2009 GMC Savana 2500 and Savana 3500
• Mahle GS33578A cross-references GM part numbers 94011701 and 94013303

Detailed Description

Mahle GS33578A fuel injector seal kit is made for GM diesel and fuel system service applications that require reliable injector sealing. Mahle gaskets are used by OEMs and technicians worldwide for sealing performance, and this kit supports proper injector-to-engine sealing on the listed Chevrolet Silverado, Chevrolet Express, GMC Sierra, and GMC Savana models. If you are servicing a 2007-2009 Chevrolet Silverado 2500 HD or a 2008-2009 GMC Savana 3500, GS33578A provides the correct seal kit reference for the application.

Common Issues This Part Helps Address

• Fuel seepage around injector sealing points
• Hard starting caused by poor injector seal integrity
• Rough idle related to injector leakage
• Fuel odor from compromised injector seals
• Service replacement for worn or damaged injector seals

Installation Notes and Tips

Confirm engine and injector application before installation. Clean the injector bore and sealing surfaces thoroughly, and inspect related components for wear or carbon buildup before reassembly. Use the vehicle service procedure for torque and sealing sequence to ensure proper injector fitment on Chevrolet and GMC HD applications.

Quality Assurance

Mahle sealing products are engineered to meet OEM-level service expectations and are trusted in professional repair environments. This part cross-references General Motors part numbers 94011701 and 94013303 for the same application.